@@mattferrigno9750 You can, but seeing someone talk about it while holding it, pointing to different parts of it, is much more helpful than looking at a picture on the internet.
It's a University in Ireland - our AOSN - Architecture, Operating Systems and Networks teacher was probably the most tedious man I've ever met. And I've sat in 4 hour long board meetings, so that is saying something!@@natashanichole1027
Thank you so much for existing. I’m taking my first Cisco course in college and it’s so much reading. I learned so much and better in 20 mins from your video than studying a whole day. I am now going to your videos after reading cause it helps bring everything together. Thank you!!!
Man I hope you read this. Last week some friends of my university enroll in a ccna course that I really wanted to. I love this topic, network and so. I'm a student from TEC Costa Rica. I can't pay a ccna course it was somehow frustrated and I realize that this course was available. Now I can say thank you for giving this opportunity (taking into consideration there is more to cover). You no have idea how happy this made me feel. I just want you to know that you are changing someone's life in a positive way. Never stop doing this things, and the day you made the choice of working more in your channel it was for a good reason. Keep going and thank you!!!
This just gives me so many reasons of inspirations to do the same for this community of innovating curious peacocks just newly entering the field. I'd love to sometime start and educate people for free, support and give back to the field, what it gave to me... Internet is definitely a miraculous invention, and I can't thank the previous lords of networks and computers to bring about such an event
Amazing work Chuck ! :) Just a small add on. The way the switch learns the MAC for the first time is by forwarding the packet on all ports, except the one it came on. Only the intended recipient replies. Now the switch records the source MAC of the reply packet in the MAC Address table. Next time it knows which port to forward it on, since it is already recorded in the table.
Thanks bro..The video was so inclusive and then i fell into the loop "How does the switch know the mac of the dest if the CAM doesnt have it at first????" Even in my computer the simulation showed the switch send the packets to everyone out there for the first time. I got confused. Now you saved me. BTW i am a newbie
Chuck is such a good teacher... so many tutorials put me to sleep but he is so entertaining and informed that i watch them for fun and knowledge. Truly a blessing!
You’re awesome. I have ADHD and it’s hard as hell to follow along and focus most of the time but your videos are SO easy to follow along. Keep up the great work!
I'm not diagnosed, never reached out/attempted to do so, but I'm almost certain I have it aswell. Just been an overwhelming amount of signs over the years, and textbooks etc are clearly not ideal for me - this guy on the other hand taught me so much in just two short videos already. His format makes it so easy to focus. What a great teacher.
I wholeheartedly agree, I can never stay longer than 5 minutes on other people's videos because I just distract myself all the time, but this man does the mini-distractions for me, and then brings me right back into the topic at hand so effortlessly
Been in programming courses at my local college for a couple years now, this one video alone gave me more confidence in my knowledge and actually taught me some things, will definitely be continuing to learn more as a programmer. I know/think it’s very important to understand even base level connections like this
I'm taking a CCNA course on youtube rn and watching these videos are like the perfect review and confirms my understanding of these topics! It feels so good to watch these videos and understand everything
@@oussamahafez9117 You should get more detailed courses. These videos are good for a quick overview and explaining things in a very beginner-friendly way before you start a more difficult course
I just finished taking my first data and lans class for college and wow I am just amazed why I don’t find this channel earlier this is really engaging and really breaks it down for us normal people who are new to tech.
This guy is more engaging than most of my college professors. He actually makes the stuff interesting. I also lost my shit when I saw Johnny and Lisa 😂
I love your energy. I’m a young dude trying to find out what I want to do in IT , and your excitement and enthusiasm made me want to keep learning networking . Thank you for this video!
You are one of the best teachers ever. Your way of explaning, the speed, the graphic, the vocal tones, the way you answer questions one may have before one even asks. Fantastic stuff. Just wanted to say thank you for taking the time to put this out there like this.
So nice to actually learn something and feel engaged. Every other channel I come across is just someone reading off of a slideshow that, by the end of, I still haven't retained anything because nothing is explained. You are one in a million, Chuck. Thank you, dude.
Chuck, you are the man! I love your passion and authenticity. Nice to see "young" people passionate about their craft these days. I'm a software developer with an interest in better understanding networking ... it's becoming more and more necessary as things move to the cloud.
I’m currently transitioning to the Cyber field after serving 8 years in the military. Not an easy transition. In 8 months I have already achieved Sec+ and am studying for the GSEC. I have to say this guy is the easiest person to learn from. If I’m confused about a concept I know who has my back 😂 THANKS CHUCK!
Hello Chuck ! I wanted to let you know that your excitement, your passion, the way you explain stuff and your courses made me finish CCNA 1 & 2 and I even got a letter of merit for getting excellent points. Getting into comptia+, ITIL, Powershell and a course in Linux. You are a great inspiration and motivation to get me through the difficult parts of everything. Thank you very much !
Man its about time NetworkChuck came up with a free course. I always felt like he needed to teach a free course on TH-cam!!! I LOVE it. He is even using the movie clips just like I do. Time to continue recording my CCNA course, Way to go Chuck!!!
Honestly I cannot express how grateful I am that this is free. This whole series is extremely informative, interactive, and genuinely fun to watch. You’re a wonderful instructor and you have definitely earned my support. Keep up the awesome work!
The visual effects and the teaching method is absolutely brilliant. This man gives so much motivation to learn and keep going. I am on maternity leave returning to office (service provider) in a year and wanted to refresh my knowledge. Never seen such an enthusiatic teacher with so well prepared material. Thanks so much, it actually gives big motivation to go for the exam 👏👏.
All thanks 🙏 to Hackergold02 on instagram for the great job done ✅ after someone got my password and started extorting my friend for money till I get referred to use Hackergold02 on instagram and thanks God they are able to recover my account back to me thanks 🙏 to you and always the best ❤️💯
I’m a final year graduation student and I swear interested in networking because of your videos bro.. I’ll informed my friends to subscribe your channel and follow yours videos as basic..Thank u broo.
I must say, first and foremost your content designing is just amazing. By far have not ever came across any such channel that had created such extensive content on each topic. i landed on your channel really very late but better late than never. so thanks to youtube for populating your channel . second, your way of explaining stuffs in a fun way is just another cherry on the cake. and then the practice questions. Amalgamation of all 3 above make your channel one of the best places to learn.
Thank you, thank you so much. I've been a hobbyist/mediocre-on-my-way-to-pro for SO long and it's been hard to keep my attention in one place long enough to piece it all together with any kind of efficiency. I've been catching various videos of yours for a few months now and I just gotta say... You, man... You are what speaks to me in a way my brain will absorb it effectively. Thank you so much. It's so frustrating having the brain power and the passion for all this but always coming up short on being able to focus. Please keep doing you. You rock(I know you know it). Let's do this!
This is an absolutely amazing video, as someone interested in getting into the field, this is the perfect series to start learning, not to mention the Cisco website mentioned. I did have an issue on the wireless part in the lab, where it wasn't sending the message , but with some tinkering I found out that the IPv4 Address was blank on the 3 wireless devices. It worked fine after that!
Thanks, you're a lifesaver. :) Some extra info for those who want to know exactly how to fix this: just go click on the wireless Tablet icon in the topology, click the Desktop tab, then press IP config. If your IPv4 is blank just type in the IP address as shown in the video associated with the tablet and it should automatically configure the rest of the IPs. That's at least what it did for me. I was able to proceed with the lab with this.
Hi Chuck. Just found your channel today through recommended videos next to an LTT vid. I am sitting at home burnt out from my non-IT related work for 3 months now thinking about what to do with my life and thanks to your You Suck at Subnetting series and these I am now excited about something for the first time in a long time. Thanks for that! Will be following this course closely over the coming weeks!
Dude you're such a good teacher, your enthusiasm, humor and the way you explain things is rare in this IT world. I love it, thanks. Would buy every single Udemy course you do.
Gosh you are such an amazing teacher. 2years later this video is still outstanding, I am just understanding this explicitly for the first time. Super excited to learn the others. The best part is I barely stumbled on this video. Thank you a great deal
If I didn't get to know your channel I would never get to know and love networking so much. Thank you for your time and work that you put in this contents, i think the world deserves more people like that are willing to help others.
Chuck, a massive thanks for your amazing videos. You are a great teacher, your pace and the way to explain is some of the best I've seen around youtube!
Hey Sean, I am in the exact same boat. Been working through Daves course but feel like I have some knowledge gaps or Dave assumes some knowledge. Do you have those same moments while working through the Udemy material? How do you go with most of his labs?
@C Green At the beginning i wasn't doing good in his labs, i realized that i'm not practicing enough, so i made my own topology and i tried troubleshooting it, when i don't understand something or i needed some help i go to the Network Engineering Stack Exchange: networkengineering.stackexchange.com/ website and i post my questions in there, very helpful people there, after troubleshooting my own topology, i noticed big difference and i started to complete every lab that i had to answer after.
Thank you for your passion, attention to detail, and sensibility to simplify without compromising essentials. You are special. Please keep it up. You are helping change lives for the better. Rock’n roll brother.
Thank you for this, seriously. I am currently doing a course at college which includes a CCNA certificate. I can't wait to use your videos alongside. You make it fun to learn this.
Hello Chuck, I have never seen such an educational and at the same time entertaining video about the dry topic of IT networks on TH-cam. I would like to thank you and ask you to continue like this. it is art. THANK YOU. Greetings, Deniz from Hamburg
I love your passion. This was what I was trying to find "the best instructor" who can help to get my CCNA. I am sure this video will help me not only to pass the test but, also to have solid foundation. Thank you
Question: Switches only knows about mac addresses as it only deals with layer 2. But when you sent a ping command from your computer to another ip address, how does the switch know what mac address that ip address is mapped to? U didnt send "ping mac address" but ping ip address. Much appreciated if someone can clarify this for me thanks
Also had this question, from my understanding, when Laptop A pings Laptop B for the first time it sends out an ARP request to the switch to send that request out to everyone asking for the MAC address associated with that ip address. In this case laptop B says that's mine and sends back that MAC address to Laptop A where it's stored in the ARP cache of that computer. Now laptop A layer 2 frame sent to the switch has both MAC addresses
The computer creates a Layer 3 IP packet with its own IP address as the SOURCE IP and the destination IP address as the DESTINATION IP. This IP packet is only read by routers and other devices (such as computers and servers). Switches cannot read the IP packet. Your question is how then does the switch know where to send the packet? The computer has an ARP cache where it maps the IP address to the MAC address of other devices on the same network. The computer encapsulates (aka encloses) the Layer 3 IP packet with a Layer 2 frame. The Layer 2 frame contains the SOURCE MAC and the DESTINATION MAC addresses (from the computer's ARP cache). The switch reads the Layer 2 frame (containing the MAC addresses) but the switch never reads the Layer 3 packet (containing the IP addresses). The receiving computer will remove the Layer 2 frame and read the Layer 3 IP packet.
hey I see a couple questions asking this. although chuck showed the packet tracer information of a packet/frame visually you still might not get it until you study OSI model and the smaller parts in a frame. So let me try to explain this quickly we mentioned the OSI model with Levels or Layer - these are mostly theoretical Because only Layer 1 actually moves data about as electricity!, so Layer 1 lives in the real world with you and me ;) and the other 6 layers up are all in the head of the computer!. [Off-topic: Layer 1 is discussed in thereal world for speed of data transfer and that's shown in BITS, so Kb or Mb with a small B. So when you torrent illegal stuff or you upload to your google drive you some 'speed' it's actually in BITS. Anything above that or mental stuff is in BYTES. Standard 8 bytes. Like a Sandwich 8 ingredients in EVERY byte ! :D ham, lettuce, pepperoni, cheese, another type of cheese, tomatoes, bread and sauce (mayonnaise please) That a capital B, so KB, MB, GB. This is always and all the data at rest. Stored magically on your hard drive (HDD) or the newer solid state drives with chips instead of magnetic disks (SDD). Sometimes google, apple, facebook, etc they show your amount of space on their drive as bits with a small b with is WRONG! ON THEIR PART! But most people have no idea. Trust me, this is the school of it, small bits for data transfer as electricity inside wires going under the sea or signals going up to space to a satellite. Once it is in. The receiving device, whatever it is, will *ALWAYS* read it as BYTES (groups of 8 bits). Because it was de-encapsulated or written into electricity FROM Bytes, moves as electricity (as 1 or 0) in bits, then gets read or encapsulated as BYTES again. The same information from the other end!] Ok a bit long sorry:D Because wires can only read or receive ONE bit a time. We need rules GOLDEN RULE NUMBER ONE!: Maximum transmission size of 1500 bytes. [not bits! computers don't speak bits, only wires do] So about 1.5 KB. Like a really small notepad document with GTA codes or a christmass shopping list. ALWAYS even if you transfer 200 TERABYTES as company data or 2MEGABYTES as a picture, gets broken into 1.5Kb. Now you need headers: Source IP address, destination IP address, Mac source and destination, ports, and much more! These go INSIDE THE MTU of 1.5KB. So you can actually send 1.4KB something of data NOT 1.5 KB. >> Mostly the headers size are produced automatically. But sometimes you adjust manually on the router such as with GRE for example. (it's a CCNP topic...a routing protocol for sending stuff over the internet). So this stuff of 1.5KB has many names but it's the same thing. It's a DATA UNIT or Protocol Data Unit - PDU. L2 - Frames L3 - Packets L4 - Segment if using TCP or Datagram if using UDP (only tcp and udp are used at Layer 4 basically...) L5, 6, 7 - just data really....it's called data :D so it has MANY NAMES but it's ONE DUDE!^ remember the faceless people from Game of Thrones? :D So these packets contain BOTH mac addresses AND ip addresses. Switches simply are programmed to not read layer 3. They receive the information of layers 3, 4 and the data but do not read it. They don't know how. Similarly routers don't read the layer 2 frame information! So you have a cisco network. And you bring a new host to a switch. It has a MAC address from the factory! but not IP...the IP address can change over time!! ever hid you PCs IP address? VPN...Proxy...Tor... [you can change the MAC address too using special software, of course, but the BIOS of your devices motherboard has the MAC address in it no matter what - unless you mess up the BIOS settings :/ ] - this is what they do with wi-fi in coffee shops. Get your laptop and buy a cheap wifi USB antenna from amazon. Because wifi acts like a HUB as chuck said in the video, you pay attention to the packets, wait for something from the router, see it's mac address. Wait for a login packet from a customers phone or laptop. See his MAC address. And now "spoof" your mac and IP address with software, probably using Kali Linux, you pretend to be one of them and get in. So a hub is like computer authentication in a building with NO CCTV. Just plug something in the key hole. A switch is a human bodyguard with a uniform.
I am just starting to learn about IT/Networking, and wanting to do a career change from administrative work to something related to IT. I plan on getting my CCNA as a starting point. I kind of already knew the basics of a Network Infrastructure BUT this video really helped dive deeper into one aspect of the Network (Switches). I am so excited to watch the rest of them. The visuals and analogies used to explain each part is very helpful to me, as I am not an atypical leaner. Thanks so much and looking forward to more content.
Hey Chuck, love the channel you created and thanks for making content like this for new people like me. I have one question/constructive criticism about the video. I was not able to follow along in the lab after the 16:05 min time stamp. At this point in the video is when you added IP addresses for the tablet pc on the wireless network somehow, but did not include any info as to how to do that. it was "click, click, done" and on with the lesson. For noobs like me even the basic stuff has to be spelled out. I have been to several forums and several you tube videos but can not find anyone to explain that basic step and as a result the rest of the lab was useless because without IP addresses no communication. Thanks for what you do.
I'm sure I'm late to help you but for anyone else with this problem... Click on the tablet and under Config > Global > Settings - there is an option to enter an IP address under default Gateway within the Gateway/DNS IPv4 box.
Hey Chuck, love this and will be using it in my high school cyber security class (that requires a background in networking to take the CompTIA Sec+ exam). Do you have a Patreon? I'd love to support you.
@@Crowd_Surfer5.0 Just wondering what job are you working at currently and what would you say the pros and cons of it are? I'm actually a uni student looking to switch into a different field.
@@Crowd_Surfer5.0 I am not a network engineer, I feel stupid every day. I’ve been doing this “IT Thing” for nearly fifteen years and have always worked for companies that have a separate networking team, leading me to be an expert on other things, I now don’t have that luxury and now need to learn networking and get a CCNA in a short space of time. I know what a VLAN is. I don’t know much else. God help me
I am CCNP and I work as a network and security engineer but for some reason Chuck makes me want to start learning ccna again😂😂...Newbies take note, this man's teaching is on a next level.
17:16 How the "frame" PDU is containing the Mac address of the destination device? when we ping, we pinged on the IP address, not on the MAC address, we didn't give the ping command the MAC, we just gave it the IP, so how the "frame" now contains the MAC address of the destination device? In other words: How the IP address of the destination device is matching the MAC address of the destination device? In other words: Switches are layer 2 devices, they don't know what is an IP address, they just know MAC addresses. In other words: there should be an ARP "frame" that is being sent to the switch first to match the IP address "we passed to the ping command" with the destination MAC address. right?
hey I see a couple questions asking this. although chuck showed the packet tracer information of a packet/frame visually you still might not get it until you study OSI model and the smaller parts in a frame. So let me try to explain this quickly we mentioned the OSI model with Levels or Layer - these are mostly theoretical Because only Layer 1 actually moves data about as electricity!, so Layer 1 lives in the real world with you and me ;) and the other 6 layers up are all in the head of the computer!. [Off-topic: Layer 1 is discussed in thereal world for speed of data transfer and that's shown in BITS, so Kb or Mb with a small B. So when you torrent illegal stuff or you upload to your google drive you some 'speed' it's actually in BITS. Anything above that or mental stuff is in BYTES. Standard 8 bytes. Like a Sandwich 8 ingredients in EVERY byte ! :D ham, lettuce, pepperoni, cheese, another type of cheese, tomatoes, bread and sauce (mayonnaise please) That a capital B, so KB, MB, GB. This is always and all the data at rest. Stored magically on your hard drive (HDD) or the newer solid state drives with chips instead of magnetic disks (SDD). Sometimes google, apple, facebook, etc they show your amount of space on their drive as bits with a small b with is WRONG! ON THEIR PART! But most people have no idea. Trust me, this is the school of it, small bits for data transfer as electricity inside wires going under the sea or signals going up to space to a satellite. Once it is in. The receiving device, whatever it is, will *ALWAYS* read it as BYTES (groups of 8 bits). Because it was de-encapsulated or written into electricity FROM Bytes, moves as electricity (as 1 or 0) in bits, then gets read or encapsulated as BYTES again. The same information from the other end!] Ok a bit long sorry:D Because wires can only read or receive ONE bit a time. We need rules GOLDEN RULE NUMBER ONE!: Maximum transmission size of 1500 bytes. [not bits! computers don't speak bits, only wires do] So about 1.5 KB. Like a really small notepad document with GTA codes or a christmass shopping list. ALWAYS even if you transfer 200 TERABYTES as company data or 2MEGABYTES as a picture, gets broken into 1.5Kb. Now you need headers: Source IP address, destination IP address, Mac source and destination, ports, and much more! These go INSIDE THE MTU of 1.5KB. So you can actually send 1.4KB something of data NOT 1.5 KB. >> Mostly the headers size are produced automatically. But sometimes you adjust manually on the router such as with GRE for example. (it's a CCNP topic...a routing protocol for sending stuff over the internet). So this stuff of 1.5KB has many names but it's the same thing. It's a DATA UNIT or Protocol Data Unit - PDU. L2 - Frames L3 - Packets L4 - Segment if using TCP or Datagram if using UDP (only tcp and udp are used at Layer 4 basically...) L5, 6, 7 - just data really....it's called data :D so it has MANY NAMES but it's ONE DUDE!^ remember the faceless people from Game of Thrones? :D So these packets contain BOTH mac addresses AND ip addresses. Switches simply are programmed to not read layer 3. They receive the information of layers 3, 4 and the data but do not read it. They don't know how. Similarly routers don't read the layer 2 frame information! So you have a cisco network. And you bring a new host to a switch. It has a MAC address from the factory! but not IP...the IP address can change over time!! ever hid you PCs IP address? VPN...Proxy...Tor... [you can change the MAC address too using special software, of course, but the BIOS of your devices motherboard has the MAC address in it no matter what - unless you mess up the BIOS settings :/ ] - this is what they do with wi-fi in coffee shops. Get your laptop and buy a cheap wifi USB antenna from amazon. Because wifi acts like a HUB as chuck said in the video, you pay attention to the packets, wait for something from the router, see it's mac address. Wait for a login packet from a customers phone or laptop. See his MAC address. And now "spoof" your mac and IP address with software, probably using Kali Linux, you pretend to be one of them and get in. So a hub is like computer authentication in a building with NO CCTV. Just plug something in the key hole. A switch is a human bodyguard with a uniform.
Awesome video! To those who're wondering "how the destination MAC address is known with just their IP address?", you need to look at *ARP (Address Resolution Protocol)* which is responsible for that function. Happy learning! :)
Honestly I don't think I've really commented on any TH-cam video that I've learnt from until I watched this video, you're exceptional and I enjoy your passion when you teach networking. You swept me off my feet so I had to subscribe to your channel. 💯Good Job and thanks to Boson for sponsoring this video
Thank you for this series. My university course made me think that this is such a boring subject but your enthusiastic teaching made me want to pursue the subject further.
If you know the network address (192.168.10.0, or 200.200.10.0, for a couple of examples) and how many hosts you can have in your network (subnetting), you can configure it manually (static) with any of the IP addresses in your network. Or, just use DHCP and the device set up to provide an IP address (a router or a DHCP server, for example) automagically (dynamic)..
I'm just starting my CompTIA A+ journey and Switches, Hubs and Routers etc have confused me no end. Your videos have made so much sense to me so thank you 😊
Not sure if this is how to properly configure it, but...if you click on the wireless client(tablet pc0,1,2) that brings up a window. Then click on "Config" at the top. Then under INTERFACE on the left, click Wireless0. And make sure in IP Configuration select Static and input the IPv4 Address and Submet Mask (255.255.255.0).
I never understood switches etc when explained in class or some other videos as they are all just theoretical. But because of this video I understood very well. Thank you very much for the efforts to explain in detail with practicals. Always felt overwhelming about networking but this video made me fall in love with networking. This is called as content 🔥🔥🔥
i had been working in electronic for 9 years and you are so amazing in explaining things and you made be so interested in networking even though i thought it is going to be so boring because i am hardware programmer,, man you are so amazing keep going !!
I was an RF Engineer for 10 years and I just moved over to Core/Network Engineering and these videos are helping me learn and bridge the gap in my knowledge so thanks for the amazing guide!
Best TH-camr ever. You exponentially made me far more interested in IT/Cyber security than I have been. (Been working on security +, and networking +) it’s been very intimidating to try to learn but your videos make it so easy to understand and gives me hope I can switch into this new, exciting career.
I am so so grateful for this videos! My instructors could not explain that well! I am given facts-this is this this is that, but no explanation of what exactly is happening... This is a BIG help! Thank you!
I’m starting a cyber security job very soon and these videos have been incredibly helpful this man knows how to break down info and keep it as bites size and understandable as possible. Thankyou for helping all of us you sir are a real one much love ❤️🧠
you know what, i'm going to do it. Been working in networking for 12+ years and i think im finally tired of imposter syndrome, i'm gonna do it. Lets put this practice into something formal. today is find old cisco routers/switches at work day.
Stumbled upon your course in a sea of them. Honestly very satisfied for the first two days, and as an18 year old your way of teaching is just not boring and actually makes me want to learn. Keep going!
I had to comment on this. You are a rockstar teacher. You explained this in such clarity that I am understanding this in ways far more than how it is taught in my current classes. You are a phenomenal teacher!!! God Bless
My three years university program, Network and Systemadministration, have just started, and it's perfect that I found your channel. This sure will help me get a kick start
Currently in a networks college course but have been looking for supplemental material on TH-cam. Found a few videos that helped a little but this one helps A LOT. Best explainers I have seen yet - good job.
Your videos are amazing. Everything about rhem is handled the right way and they're funny and engaging. I just landed my first IT job, having never learned anythimg that happens pre modem and I'm lost. This course is much needed.
This guy doesn't just teach you, but he inspires you to become a network engineer. Thank you so much.
Finally a networking video that shows the actual hardware, visuals are very helpful.
Feel you
could not agree more with you!
You can't google a picture of a switch? It's literally a metal box with a bunch of RJ-45 connections.
Can confirm. As a strong visual learner, this would be a great tool to use if I had the hardware.
@@mattferrigno9750 You can, but seeing someone talk about it while holding it, pointing to different parts of it, is much more helpful than looking at a picture on the internet.
Even a retired 80 years old granny will pass the exam after watching your videos man ))) Thank you so much !
hey, don’t call me out like that! 🙆🏻♂️
lets hope so I am a 74 year old Uncle.
Currently doing a CS course, and I learned more in this 20 min video than a 2 hour lecture. Great work.
What school? Sounds just like me lol. Have to teach myself anyway
It's a University in Ireland - our AOSN - Architecture, Operating Systems and Networks teacher was probably the most tedious man I've ever met. And I've sat in 4 hour long board meetings, so that is saying something!@@natashanichole1027
Thank you so much for existing.
I’m taking my first Cisco course in college and it’s so much reading. I learned so much and better in 20 mins from your video than studying a whole day.
I am now going to your videos after reading cause it helps bring everything together.
Thank you!!!
Man I hope you read this.
Last week some friends of my university enroll in a ccna course that I really wanted to. I love this topic, network and so. I'm a student from TEC Costa Rica. I can't pay a ccna course it was somehow frustrated and I realize that this course was available. Now I can say thank you for giving this opportunity (taking into consideration there is more to cover). You no have idea how happy this made me feel. I just want you to know that you are changing someone's life in a positive way. Never stop doing this things, and the day you made the choice of working more in your channel it was for a good reason. Keep going and thank you!!!
This just gives me so many reasons of inspirations to do the same for this community of innovating curious peacocks just newly entering the field.
I'd love to sometime start and educate people for free, support and give back to the field, what it gave to me... Internet is definitely a miraculous invention, and I can't thank the previous lords of networks and computers to bring about such an event
You really ought to be learning this from someone who actually earned the cert, and not this shmuck
Hey buddy! I am from Costa Rica too, como le ha ido con CCNA? despues de 4 años? Yo aqui apenas empiezo jaja
i love how you explain stuff...i bet you can make me fall in love with the most boring stuff out there.
I even doesn't speak English and I can understand almost every thing you say WOW eres realmente bueno en lo que haces!!! Thanks Chuck.
Mmmmxvvv
Amazing work Chuck ! :)
Just a small add on. The way the switch learns the MAC for the first time is by forwarding the packet on all ports, except the one it came on. Only the intended recipient replies. Now the switch records the source MAC of the reply packet in the MAC Address table. Next time it knows which port to forward it on, since it is already recorded in the table.
Thanks bro..The video was so inclusive and then i fell into the loop "How does the switch know the mac of the dest if the CAM doesnt have it at first????" Even in my computer the simulation showed the switch send the packets to everyone out there for the first time. I got confused. Now you saved me. BTW i am a newbie
@@Harisankarbs :)
@@devamalya 😅
@@Harisankarbs i was with you :D
It's uses ARP (Address Resolution Protocol) which sends the broadcast message
Chuck is such a good teacher... so many tutorials put me to sleep but he is so entertaining and informed that i watch them for fun and knowledge. Truly a blessing!
anybody in 2024 learning
Hello friend! Yea I am just now learning this lol
Yes bro
Me
Yo
🙋🏻♂️
Dude even if I get my CCNA I feel like I need a badass beard to be qaulified as a network engineer. Love this channel.
That's the attitude right there. Lol
lvl 99999 network engineer = > ccna ,mug from network chuck and real beard
and how do girls qualify to be network engineers? :D
Then you can appear more knowledgeable than you actually are ;)
@@piros100 they have amazing hair on their head :D
You’re awesome. I have ADHD and it’s hard as hell to follow along and focus most of the time but your videos are SO easy to follow along. Keep up the great work!
Honestly same, his videos are helping me understand a lot of these topics better than my actual certification courses.
I think its because he is also high energy..I also have adhd. It sucks lol.
I'm not diagnosed, never reached out/attempted to do so, but I'm almost certain I have it aswell. Just been an overwhelming amount of signs over the years, and textbooks etc are clearly not ideal for me - this guy on the other hand taught me so much in just two short videos already. His format makes it so easy to focus. What a great teacher.
I wholeheartedly agree, I can never stay longer than 5 minutes on other people's videos because I just distract myself all the time, but this man does the mini-distractions for me, and then brings me right back into the topic at hand so effortlessly
Been in programming courses at my local college for a couple years now, this one video alone gave me more confidence in my knowledge and actually taught me some things, will definitely be continuing to learn more as a programmer. I know/think it’s very important to understand even base level connections like this
I'm taking a CCNA course on youtube rn and watching these videos are like the perfect review and confirms my understanding of these topics! It feels so good to watch these videos and understand everything
Do you think his videos are enough for me to pass my CCNA? Or do I need more detailed courses ?
@@oussamahafez9117 You should get more detailed courses. These videos are good for a quick overview and explaining things in a very beginner-friendly way before you start a more difficult course
I just finished taking my first data and lans class for college and wow I am just amazed why I don’t find this channel earlier this is really engaging and really breaks it down for us normal people who are new to tech.
I can't believe that this guy convinced me that some box that sits in a corner collecting dust in my school's computer lab is so amazing
Is this course still free??
Acquire it
This guy is more engaging than most of my college professors. He actually makes the stuff interesting. I also lost my shit when I saw Johnny and Lisa 😂
To be fair, this is a video, not a class room where you're teaching it over and over and over.
Omg how did you find it? I'm still searching for mine and people are starting to stare.
I love your energy. I’m a young dude trying to find out what I want to do in IT , and your excitement and enthusiasm made me want to keep learning networking . Thank you for this video!
You are one of the best teachers ever. Your way of explaning, the speed, the graphic, the vocal tones, the way you answer questions one may have before one even asks. Fantastic stuff. Just wanted to say thank you for taking the time to put this out there like this.
So nice to actually learn something and feel engaged. Every other channel I come across is just someone reading off of a slideshow that, by the end of, I still haven't retained anything because nothing is explained. You are one in a million, Chuck. Thank you, dude.
Chuck, you are the man! I love your passion and authenticity. Nice to see "young" people passionate about their craft these days. I'm a software developer with an interest in better understanding networking ... it's becoming more and more necessary as things move to the cloud.
I'm a CCNP myself, but it never hurts to brush up on the basics! Thank you for this, really looking forward to more of these!
Did your ccnp helps you to get a job?
If yes how can you make with ccnp
i love this stuff
teach ccnp
Can you please tell me how he got the IP addresses of the tablets to show in packet tracer? I can't find it.
"PING!".... "REPLY!" 😅 that was actually helpful. Chuck makes learning so much fun. 👍 Nice one Chuck.
Those Kids are gonna be hackers, Imagine learning about networks at that age
I’m currently transitioning to the Cyber field after serving 8 years in the military. Not an easy transition. In 8 months I have already achieved Sec+ and am studying for the GSEC. I have to say this guy is the easiest person to learn from. If I’m confused about a concept I know who has my back 😂 THANKS CHUCK!
Hello Chuck ! I wanted to let you know that your excitement, your passion, the way you explain stuff and your courses made me finish CCNA 1 & 2 and I even got a letter of merit for getting excellent points. Getting into comptia+, ITIL, Powershell and a course in Linux. You are a great inspiration and motivation to get me through the difficult parts of everything. Thank you very much !
Congrats!
@@alexcarlson481 Got a job as 1st line engineer now. Meanwhile I'm doing courses about powershell, VM Ware and looking forward to do CCNA 3. :)
Nice work man. You rock!
🤘🏻🔥👊🏻😎
Hey do you have instagram im interested and want to ask aome questions
How long did it take you to obtain your CCNA and how much study time?
Finally, I can get up off my lazy ass and focus on the CCNA, thanks NetworkChuck
Man its about time NetworkChuck came up with a free course. I always felt like he needed to teach a free course on TH-cam!!! I LOVE it. He is even using the movie clips just like I do. Time to continue recording my CCNA course, Way to go Chuck!!!
Do you have a channel?
@@leothalion3983
Tapping on his photo brings you to his channel.
Honestly I cannot express how grateful I am that this is free. This whole series is extremely informative, interactive, and genuinely fun to watch. You’re a wonderful instructor and you have definitely earned my support. Keep up the awesome work!
The visual effects and the teaching method is absolutely brilliant. This man gives so much motivation to learn and keep going. I am on maternity leave returning to office (service provider) in a year and wanted to refresh my knowledge. Never seen such an enthusiatic teacher with so well prepared material. Thanks so much, it actually gives big motivation to go for the exam 👏👏.
You make things so fun to watch and easy to understand with a little bit of humor, I'm def subscribing
Keep them coming sir! This is setting the standard for CCNA training VODs. Ill be using these for the CCNA class that I teach.
Yeah same for me I just bought Todd Lammle's guide book for CCNA. This will compliment that book very well 😊
Someone should make a discord as well!
All thanks 🙏 to Hackergold02 on instagram for the great job done ✅ after someone got my password and started extorting my friend for money till I get referred to use
Hackergold02 on instagram and thanks God they are able to recover my account back to me thanks 🙏 to you and always the best ❤️💯
@@johnkira2095 shut up you bot
I’m a final year graduation student and I swear interested in networking because of your videos bro.. I’ll informed my friends to subscribe your channel and follow yours videos as basic..Thank u broo.
finally, i got a "malayali!"
I LOL'd at that
Chuck. After retiring from I.T after 30+ years, you're still teaching me things. Keep up the good work (by the way I'm in the U.K.)
I must say, first and foremost your content designing is just amazing. By far have not ever came across any such channel that had created such extensive content on each topic. i landed on your channel really very late but better late than never. so thanks to youtube for populating your channel .
second, your way of explaining stuffs in a fun way is just another cherry on the cake.
and then the practice questions.
Amalgamation of all 3 above make your channel one of the best places to learn.
Thank you, thank you so much. I've been a hobbyist/mediocre-on-my-way-to-pro for SO long and it's been hard to keep my attention in one place long enough to piece it all together with any kind of efficiency. I've been catching various videos of yours for a few months now and I just gotta say... You, man... You are what speaks to me in a way my brain will absorb it effectively. Thank you so much. It's so frustrating having the brain power and the passion for all this but always coming up short on being able to focus. Please keep doing you. You rock(I know you know it). Let's do this!
This is an absolutely amazing video, as someone interested in getting into the field, this is the perfect series to start learning, not to mention the Cisco website mentioned. I did have an issue on the wireless part in the lab, where it wasn't sending the message , but with some tinkering I found out that the IPv4 Address was blank on the 3 wireless devices. It worked fine after that!
I was having the same problem, thanks for clearing that up.
How is it adjusted ?
Thanks, you're a lifesaver. :)
Some extra info for those who want to know exactly how to fix this: just go click on the wireless Tablet icon in the topology, click the Desktop tab, then press IP config. If your IPv4 is blank just type in the IP address as shown in the video associated with the tablet and it should automatically configure the rest of the IPs. That's at least what it did for me. I was able to proceed with the lab with this.
Hi Chuck. Just found your channel today through recommended videos next to an LTT vid. I am sitting at home burnt out from my non-IT related work for 3 months now thinking about what to do with my life and thanks to your You Suck at Subnetting series and these I am now excited about something for the first time in a long time. Thanks for that! Will be following this course closely over the coming weeks!
How did it go for your Pieter?
Dude you're such a good teacher, your enthusiasm, humor and the way you explain things is rare in this IT world. I love it, thanks. Would buy every single Udemy course you do.
Gosh you are such an amazing teacher. 2years later this video is still outstanding, I am just understanding this explicitly for the first time. Super excited to learn the others. The best part is I barely stumbled on this video. Thank you a great deal
If I didn't get to know your channel I would never get to know and love networking so much.
Thank you for your time and work that you put in this contents, i think the world deserves more people like that are willing to help others.
Chuck, a massive thanks for your amazing videos. You are a great teacher, your pace and the way to explain is some of the best I've seen around youtube!
I gave up on studying for the day until you posted this. I really enjoyed this video. Going to love mixing this up with David Bombal's udemy course.
Jeremy's IT Lab is awesome too.
Hey Sean,
I am in the exact same boat.
Been working through Daves course but feel like I have some knowledge gaps or Dave assumes some knowledge.
Do you have those same moments while working through the Udemy material?
How do you go with most of his labs?
@C Green At the beginning i wasn't doing good in his labs, i realized that i'm not practicing enough, so i made my own topology and i tried troubleshooting it, when i don't understand something or i needed some help i go to the Network Engineering Stack Exchange: networkengineering.stackexchange.com/ website and i post my questions in there, very helpful people there, after troubleshooting my own topology, i noticed big difference and i started to complete every lab that i had to answer after.
Your way of delivering content and keeping the viewer engaged is amazing! Love your videos!
the way you explain, the way you smoothly bring up a joke everything bro you deserve great gratitude
Thank you for your passion, attention to detail, and sensibility to simplify without compromising essentials. You are special. Please keep it up. You are helping change lives for the better. Rock’n roll brother.
That “Oh hi Mark” was so well used. Please tell me I’m not the only one who knows that reference. Regardless if he meant in the way I took it 😂😂😂
Oh Hi Mark! I did not hit her... i did not! lol
*Throws bottle*
That was a great film. My family say that to me all the time.
@@markboweringphotography4408 if my name was Mark it would be my favorite part about being named Mark.
You are tearing me apart lisa!!!
Thank you for this, seriously. I am currently doing a course at college which includes a CCNA certificate. I can't wait to use your videos alongside. You make it fun to learn this.
loved the ping n reply part...of course, the playlist is much appreciated one.
Hello Chuck, I have never seen such an educational and at the same time entertaining video about the dry topic of IT networks on TH-cam. I would like to thank you and ask you to continue like this. it is art. THANK YOU.
Greetings, Deniz from Hamburg
I love your passion. This was what I was trying to find "the best instructor" who can help to get my CCNA. I am sure this video will help me not only to pass the test but, also to have solid foundation. Thank you
Question: Switches only knows about mac addresses as it only deals with layer 2. But when you sent a ping command from your computer to another ip address, how does the switch know what mac address that ip address is mapped to? U didnt send "ping mac address" but ping ip address. Much appreciated if someone can clarify this for me thanks
Also had this question, from my understanding, when Laptop A pings Laptop B for the first time it sends out an ARP request to the switch to send that request out to everyone asking for the MAC address associated with that ip address. In this case laptop B says that's mine and sends back that MAC address to Laptop A where it's stored in the ARP cache of that computer. Now laptop A layer 2 frame sent to the switch has both MAC addresses
L3 switch
Same query:
My view: I think for first blank Mac frame switch broadcast that frame to all interface.
Then on reply it create CAM table.
The computer creates a Layer 3 IP packet with its own IP address as the SOURCE IP and the destination IP address as the DESTINATION IP. This IP packet is only read by routers and other devices (such as computers and servers). Switches cannot read the IP packet. Your question is how then does the switch know where to send the packet? The computer has an ARP cache where it maps the IP address to the MAC address of other devices on the same network. The computer encapsulates (aka encloses) the Layer 3 IP packet with a Layer 2 frame. The Layer 2 frame contains the SOURCE MAC and the DESTINATION MAC addresses (from the computer's ARP cache). The switch reads the Layer 2 frame (containing the MAC addresses) but the switch never reads the Layer 3 packet (containing the IP addresses). The receiving computer will remove the Layer 2 frame and read the Layer 3 IP packet.
hey I see a couple questions asking this. although chuck showed the packet tracer information of a packet/frame visually you still might not get it until you study OSI model and the smaller parts in a frame. So let me try to explain this quickly
we mentioned the OSI model with Levels or Layer - these are mostly theoretical Because only Layer 1 actually moves data about as electricity!, so Layer 1 lives in the real world with you and me ;) and the other 6 layers up are all in the head of the computer!.
[Off-topic: Layer 1 is discussed in thereal world for speed of data transfer and that's shown in BITS, so Kb or Mb with a small B. So when you torrent illegal stuff or you upload to your google drive you some 'speed' it's actually in BITS.
Anything above that or mental stuff is in BYTES. Standard 8 bytes. Like a Sandwich 8 ingredients in EVERY byte ! :D ham, lettuce, pepperoni, cheese, another type of cheese, tomatoes, bread and sauce (mayonnaise please)
That a capital B, so KB, MB, GB. This is always and all the data at rest. Stored magically on your hard drive (HDD) or the newer solid state drives with chips instead of magnetic disks (SDD).
Sometimes google, apple, facebook, etc they show your amount of space on their drive as bits with a small b with is WRONG! ON THEIR PART! But most people have no idea. Trust me, this is the school of it, small bits for data transfer as electricity inside wires going under the sea or signals going up to space to a satellite.
Once it is in. The receiving device, whatever it is, will *ALWAYS* read it as BYTES (groups of 8 bits). Because it was de-encapsulated or written into electricity FROM Bytes, moves as electricity (as 1 or 0) in bits, then gets read or encapsulated as BYTES again. The same information from the other end!]
Ok a bit long sorry:D
Because wires can only read or receive ONE bit a time. We need rules
GOLDEN RULE NUMBER ONE!: Maximum transmission size of 1500 bytes. [not bits! computers don't speak bits, only wires do]
So about 1.5 KB. Like a really small notepad document with GTA codes or a christmass shopping list. ALWAYS even if you transfer 200 TERABYTES as company data or 2MEGABYTES as a picture, gets broken into 1.5Kb.
Now you need headers: Source IP address, destination IP address, Mac source and destination, ports, and much more! These go INSIDE THE MTU of 1.5KB. So you can actually send 1.4KB something of data NOT 1.5 KB.
>> Mostly the headers size are produced automatically. But sometimes you adjust manually on the router such as with GRE for example. (it's a CCNP topic...a routing protocol for sending stuff over the internet).
So this stuff of 1.5KB has many names but it's the same thing. It's a DATA UNIT or Protocol Data Unit - PDU.
L2 - Frames
L3 - Packets
L4 - Segment if using TCP or Datagram if using UDP (only tcp and udp are used at Layer 4 basically...)
L5, 6, 7 - just data really....it's called data :D
so it has MANY NAMES but it's ONE DUDE!^ remember the faceless people from Game of Thrones? :D
So these packets contain BOTH mac addresses AND ip addresses. Switches simply are programmed to not read layer 3. They receive the information of layers 3, 4 and the data but do not read it. They don't know how. Similarly routers don't read the layer 2 frame information!
So you have a cisco network. And you bring a new host to a switch. It has a MAC address from the factory! but not IP...the IP address can change over time!! ever hid you PCs IP address? VPN...Proxy...Tor...
[you can change the MAC address too using special software, of course, but the BIOS of your devices motherboard has the MAC address in it no matter what - unless you mess up the BIOS settings :/ ] - this is what they do with wi-fi in coffee shops. Get your laptop and buy a cheap wifi USB antenna from amazon. Because wifi acts like a HUB as chuck said in the video, you pay attention to the packets, wait for something from the router, see it's mac address. Wait for a login packet from a customers phone or laptop. See his MAC address. And now "spoof" your mac and IP address with software, probably using Kali Linux, you pretend to be one of them and get in.
So a hub is like computer authentication in a building with NO CCTV. Just plug something in the key hole.
A switch is a human bodyguard with a uniform.
So far so good! Thanks for putting so much effort into these videos!
You can teach even a child 😂
Bro you are amazing ❤️
No doubt. He is the best
He is doing that loll
I am just starting to learn about IT/Networking, and wanting to do a career change from administrative work to something related to IT. I plan on getting my CCNA as a starting point. I kind of already knew the basics of a Network Infrastructure BUT this video really helped dive deeper into one aspect of the Network (Switches). I am so excited to watch the rest of them. The visuals and analogies used to explain each part is very helpful to me, as I am not an atypical leaner. Thanks so much and looking forward to more content.
Hey Chuck, love the channel you created and thanks for making content like this for new people like me. I have one question/constructive criticism about the video. I was not able to follow along in the lab after the 16:05 min time stamp. At this point in the video is when you added IP addresses for the tablet pc on the wireless network somehow, but did not include any info as to how to do that. it was "click, click, done" and on with the lesson. For noobs like me even the basic stuff has to be spelled out. I have been to several forums and several you tube videos but can not find anyone to explain that basic step and as a result the rest of the lab was useless because without IP addresses no communication. Thanks for what you do.
I'm sure I'm late to help you but for anyone else with this problem...
Click on the tablet and under Config > Global > Settings - there is an option to enter an IP address under default Gateway within the Gateway/DNS IPv4 box.
Hey Chuck, love this and will be using it in my high school cyber security class (that requires a background in networking to take the CompTIA Sec+ exam). Do you have a Patreon? I'd love to support you.
@@Crowd_Surfer5.0 Just wondering what job are you working at currently and what would you say the pros and cons of it are? I'm actually a uni student looking to switch into a different field.
@@appmania2180 I’m a Network Engineer... pros are definitely money ... cons are there’s always someone or something that will make you feel stupid
@@Crowd_Surfer5.0 I am not a network engineer, I feel stupid every day. I’ve been doing this “IT Thing” for nearly fifteen years and have always worked for companies that have a separate networking team, leading me to be an expert on other things, I now don’t have that luxury and now need to learn networking and get a CCNA in a short space of time. I know what a VLAN is. I don’t know much else.
God help me
You Can Support Him Here - ko-fi.com/networkchuck
lol please look at this positively! But I dont think you enjoy the field or subject. I really hope you find that
Thanks a lot really I love simple terms. This is the best video I ever seen.
Going for my CCNA in a couple of months. Thanks Chuck and good luck to those in the same boat!
Good luck. I strongly suggest other resources. NWC's "CCNA" series is extremely incomplete.
This guy is absolutely my number 1 tutor , easy to understand complex stuff, i wish you was my tutor in college
Poor Mr. Hub, got insulted throughout the entirety of the video
Hey man, new to the channel. I work in IT and love your vids. Also, heard your a man of the faith too. Keep it up bro!
Thanks Jimmy! And yes sir, Christ-follower.
@@NetworkChuck Amen, my Boss gave me the access to review all your videos because he knows I'm a geek and love tech and what I do. Oh yes and a gamer
@@NetworkChuck Followed on Instagram and by the way, you ever want to play COD, my Activision ID is
Aceblackk#4164793. I have it on PS4 and Xbox lol
I am CCNP and I work as a network and security engineer but for some reason Chuck makes me want to start learning ccna again😂😂...Newbies take note, this man's teaching is on a next level.
@@marly3989 what is the difference between CCNA and CCNP ?
The "Oh, hi Mark!" Made me chuckle such a great movie 🤣🤣🤣
Keep the light shining and burning Chuck! Your teaching model is high-level which is what the world needs!
Gosh, you just seem like such a nice, kind and enthusiastic man. It's a joy learning from you Chuck!
Chuck, you deserve my networking professor's salary.
Such a video I never seen , what a sinario! Amazing 👌
17:16 How the "frame" PDU is containing the Mac address of the destination device? when we ping, we pinged on the IP address, not on the MAC address, we didn't give the ping command the MAC, we just gave it the IP, so how the "frame" now contains the MAC address of the destination device?
In other words: How the IP address of the destination device is matching the MAC address of the destination device?
In other words: Switches are layer 2 devices, they don't know what is an IP address, they just know MAC addresses.
In other words: there should be an ARP "frame" that is being sent to the switch first to match the IP address "we passed to the ping command" with the destination MAC address. right?
it's like a box ... ip is inside the box ... but mac src and dest is always on the box ... so it's sent hyperthericly
hey I see a couple questions asking this. although chuck showed the packet tracer information of a packet/frame visually you still might not get it until you study OSI model and the smaller parts in a frame. So let me try to explain this quickly
we mentioned the OSI model with Levels or Layer - these are mostly theoretical Because only Layer 1 actually moves data about as electricity!, so Layer 1 lives in the real world with you and me ;) and the other 6 layers up are all in the head of the computer!.
[Off-topic: Layer 1 is discussed in thereal world for speed of data transfer and that's shown in BITS, so Kb or Mb with a small B. So when you torrent illegal stuff or you upload to your google drive you some 'speed' it's actually in BITS.
Anything above that or mental stuff is in BYTES. Standard 8 bytes. Like a Sandwich 8 ingredients in EVERY byte ! :D ham, lettuce, pepperoni, cheese, another type of cheese, tomatoes, bread and sauce (mayonnaise please)
That a capital B, so KB, MB, GB. This is always and all the data at rest. Stored magically on your hard drive (HDD) or the newer solid state drives with chips instead of magnetic disks (SDD).
Sometimes google, apple, facebook, etc they show your amount of space on their drive as bits with a small b with is WRONG! ON THEIR PART! But most people have no idea. Trust me, this is the school of it, small bits for data transfer as electricity inside wires going under the sea or signals going up to space to a satellite.
Once it is in. The receiving device, whatever it is, will *ALWAYS* read it as BYTES (groups of 8 bits). Because it was de-encapsulated or written into electricity FROM Bytes, moves as electricity (as 1 or 0) in bits, then gets read or encapsulated as BYTES again. The same information from the other end!]
Ok a bit long sorry:D
Because wires can only read or receive ONE bit a time. We need rules
GOLDEN RULE NUMBER ONE!: Maximum transmission size of 1500 bytes. [not bits! computers don't speak bits, only wires do]
So about 1.5 KB. Like a really small notepad document with GTA codes or a christmass shopping list. ALWAYS even if you transfer 200 TERABYTES as company data or 2MEGABYTES as a picture, gets broken into 1.5Kb.
Now you need headers: Source IP address, destination IP address, Mac source and destination, ports, and much more! These go INSIDE THE MTU of 1.5KB. So you can actually send 1.4KB something of data NOT 1.5 KB.
>> Mostly the headers size are produced automatically. But sometimes you adjust manually on the router such as with GRE for example. (it's a CCNP topic...a routing protocol for sending stuff over the internet).
So this stuff of 1.5KB has many names but it's the same thing. It's a DATA UNIT or Protocol Data Unit - PDU.
L2 - Frames
L3 - Packets
L4 - Segment if using TCP or Datagram if using UDP (only tcp and udp are used at Layer 4 basically...)
L5, 6, 7 - just data really....it's called data :D
so it has MANY NAMES but it's ONE DUDE!^ remember the faceless people from Game of Thrones? :D
So these packets contain BOTH mac addresses AND ip addresses. Switches simply are programmed to not read layer 3. They receive the information of layers 3, 4 and the data but do not read it. They don't know how. Similarly routers don't read the layer 2 frame information!
So you have a cisco network. And you bring a new host to a switch. It has a MAC address from the factory! but not IP...the IP address can change over time!! ever hid you PCs IP address? VPN...Proxy...Tor...
[you can change the MAC address too using special software, of course, but the BIOS of your devices motherboard has the MAC address in it no matter what - unless you mess up the BIOS settings :/ ] - this is what they do with wi-fi in coffee shops. Get your laptop and buy a cheap wifi USB antenna from amazon. Because wifi acts like a HUB as chuck said in the video, you pay attention to the packets, wait for something from the router, see it's mac address. Wait for a login packet from a customers phone or laptop. See his MAC address. And now "spoof" your mac and IP address with software, probably using Kali Linux, you pretend to be one of them and get in.
So a hub is like computer authentication in a building with NO CCTV. Just plug something in the key hole.
A switch is a human bodyguard with a uniform.
@@rohanofelvenpower5566 exception on golden rule number 1: jumbo frames :p
I’m a 56 yrs young and loving this. Now I’ll know what I see when I do surveys in the field
Been in school for 8 years and your teaching style is better than any curriculum ever made
"I did not ping you Lisa! I did nooot!"
Lisa? Local Integrated System Architecture. Well, she's old.
Awesome video! To those who're wondering "how the destination MAC address is known with just their IP address?", you need to look at *ARP (Address Resolution Protocol)* which is responsible for that function. Happy learning! :)
Honestly I don't think I've really commented on any TH-cam video that I've learnt from until I watched this video, you're exceptional and I enjoy your passion when you teach networking.
You swept me off my feet so I had to subscribe to your channel. 💯Good Job and thanks to Boson for sponsoring this video
Thank you for this series. My university course made me think that this is such a boring subject but your enthusiastic teaching made me want to pursue the subject further.
Noob question, how did you add the IP Addresses on those 3 Tablets? Thank you!
If you know the network address (192.168.10.0, or 200.200.10.0, for a couple of examples) and how many hosts you can have in your network (subnetting), you can configure it manually (static) with any of the IP addresses in your network. Or, just use DHCP and the device set up to provide an IP address (a router or a DHCP server, for example) automagically (dynamic)..
Yeah that stumped me too!
@@ozyscotty hey man anyone help you out with the answer im stumped aswell
@@bajbaj4977 no mate no such luck
@@ozyscotty watched the rest of the video and realised we don't need it right now ahah
1). D
2). D
3). Oh boo! I thought he said ten questions.
Hey Chuck the link for the lab isn't working
Go ask modi
Ex hindu?😅@@Ex-hindu-w3w
I'm just starting my CompTIA A+ journey and Switches, Hubs and Routers etc have confused me no end. Your videos have made so much sense to me so thank you 😊
This dude is a genius. I think that in order to appreciate him, you have to hear two others like I did.
Did i miss a step in packet tracer my wireless network didn’t have any IP addresses?
and i couldnt figure out how to add the ip addresses the way he did em @ 16:07
@@mavericks.9638 I'm stuck too. Any ideas?
Same here, I was looking around on how to add the IP and couldn't figure it out. If anyone has please share, thanks in advance.
Not sure if this is how to properly configure it, but...if you click on the wireless client(tablet pc0,1,2) that brings up a window. Then click on "Config" at the top. Then under INTERFACE on the left, click Wireless0. And make sure in IP Configuration select Static and input the IPv4 Address and Submet Mask (255.255.255.0).
How did he add the IP addresses for the tablets can anyone clarify this for me ???
He didn't add it manualy. The switch figures it out automaticaly by useing a protocol named DHCP which you will learn later.
Yes I can, just drop u mail id here .
@@mihirkatoch1110 please show me the way. Thank you in advance.
First 5 minutes of this video: "Isn't that amazing?!"
I never understood switches etc when explained in class or some other videos as they are all just theoretical. But because of this video I understood very well. Thank you very much for the efforts to explain in detail with practicals. Always felt overwhelming about networking but this video made me fall in love with networking. This is called as content 🔥🔥🔥
cisco packet tracer doesn't download anymore 2022
i had been working in electronic for 9 years and you are so amazing in explaining things and you made be so interested in networking even though i thought it is going to be so boring because i am hardware programmer,, man you are so amazing keep going !!
I was an RF Engineer for 10 years and I just moved over to Core/Network Engineering and these videos are helping me learn and bridge the gap in my knowledge so thanks for the amazing guide!
youre a hero chunk for such high quality content! love you!!!!
Best TH-camr ever. You exponentially made me far more interested in IT/Cyber security than I have been. (Been working on security +, and networking +) it’s been very intimidating to try to learn but your videos make it so easy to understand and gives me hope I can switch into this new, exciting career.
I am so so grateful for this videos! My instructors could not explain that well! I am given facts-this is this this is that, but no explanation of what exactly is happening... This is a BIG help! Thank you!
I’m starting a cyber security job very soon and these videos have been incredibly helpful this man knows how to break down info and keep it as bites size and understandable as possible.
Thankyou for helping all of us you sir are a real one much love ❤️🧠
you know what, i'm going to do it. Been working in networking for 12+ years and i think im finally tired of imposter syndrome, i'm gonna do it. Lets put this practice into something formal. today is find old cisco routers/switches at work day.
Stumbled upon your course in a sea of them. Honestly very satisfied for the first two days, and as an18 year old your way of teaching is just not boring and actually makes me want to learn. Keep going!
There is absolutely no reason to not like this video. The way you explain stuffs are just awesome 👍
I had to comment on this. You are a rockstar teacher. You explained this in such clarity that I am understanding this in ways far more than how it is taught in my current classes. You are a phenomenal teacher!!! God Bless
My three years university program, Network and Systemadministration, have just started, and it's perfect that I found your channel. This sure will help me get a kick start
Currently in a networks college course but have been looking for supplemental material on TH-cam. Found a few videos that helped a little but this one helps A LOT. Best explainers I have seen yet - good job.
Absolutely amazing can’t believe I’m paying thousands for college when you do such a better job!!! Thank you so much
Know this is old thread. But, I want to commend Chuck on his excellent teaching style. Really appreciate you sharing the knowledge!
Your videos are amazing. Everything about rhem is handled the right way and they're funny and engaging. I just landed my first IT job, having never learned anythimg that happens pre modem and I'm lost. This course is much needed.
Best networking tutor online or offline! Pretty much the sole reason I started my IT journey. Thank you Chuck!
Thank you,these are veryyy helpfull