Understanding Switches
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- เผยแพร่เมื่อ 21 ก.ค. 2024
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Info
Level: Beginner
Date Created: July 12, 2010
Length of Class: 57 Minutes
Tracks
Networking
Prerequisites
Introduction to Networking
Purpose of Class
This class discusses the purpose of network switches and their functions.
Topics Covered
Switches vs. Hubs
Managed vs. Unmanaged Switches
Speeds and Duplex
Quality of Service
Power Over Ethernet
VLAN
Spanning Tree Protocol
Class Notes
Basic Switch Concepts
A hub simply splits the Ethernet signal like a cable splitter
Broadcast storms happen when too many computers are trying to talk at once
Switches allow multiple computers to be able to talk at the same time.
Switches are OSI Model layer 2 devices and use network devices MAC Addresses for identification
Managed vs. Unmanaged Switches
Unmanaged switches are completely automatic
Managed switches can be configured
Speed
Speeds -- 10Mbps / 100Mbps / 1000Mbps
Full Duplex means a device can send and receive traffic at the same time
Half Duplex means a device can either receive or transmit traffic
Backplane determines how much total data a switch can handle
Trunk Connection allow multiple switches to be tied together
VLANs are separate LANs on the same switch
POE -- Power Over Ethernet allows you to power network devices using cat5 cable
QOS/ COS -- allows you to prioritize network packets so that real time communication is not interrupted by file transfers.
Spanning Tree Protocol is a networking protocol that helps prevent network loops - วิทยาศาสตร์และเทคโนโลยี
Man, you're saving my exam 10 years after uploading the video!😄
Eli, I'm working on my network+ cert; you've taught me more about switches than TWO semesters at my local college. That speaks volumes for your teaching abilities.
Eli, I know this is an ancient video and you moved on to teaching different stuff loooong ago, but just want to express appreciation of your detailed approach. Your videos really stay in my mind, probably because you repeat what you said in few different ways and go into so much detail. Thanks a lot! Great help for someone with no technical background.
i hope this guy makes youtube money, he deserves it
facts
I hope even more he is making money from Cisco...
He is
Great to listen to Eli and benefit from his wisdom. He's very kind to be going through all the trouble to produce these lessons. He must have a teacher's heart.
Eli, I don't have enough words to thank you. The amount of information that you had shared in this video is enormous. GOD BLESS YOU!!!!!
Man I almost forgot how pure gold you are.
I'm in the process of retraining to become an IT systems technician. Somehow I understand your explanations way easier than my actual teachers explanation in class - I guess bilingual learning is not my thing (german XOR english).
Your lessons are detailed and well structured while keeping it relaxed. You do iterations almost always where I need them so I don't have to skip back and forth =)
Thank you very very much, sir!
Well done. You make IT sound so easy. I got a promotion from help desk to network analysis and you really help me learn the basics. Thank you
Congrats on your promotion. :)
I know what he is saying is the basics because he says "basically" every 30 secs.
Congrats, Shaun on your promotion! Learning never stops in this field. Best of luck!
Congrats! 3 years past, now I believe your are senior network engineer.
Where were you working when promoted? Still there?
yay so happy for you! i got burned for trying to start help desk career
eli said "when you have 50 people in an office doing stupid staff""the network may fail!' that comment made my day
Incredible! I came here getting an understanding of switches and routers as a newbie obtaining detailed info for my Comptia A+ and now I am hooked on your lectures. I am blown away with the knowledge. Thank you very much!
I know this is an older video but I have learned more from this guy in the 58 minutes watching this than I did from anything I have ever read on my own. fantastic lessons and looking forward to watching all the others. Thank you from someone who was pushed into handling my office network without having the background to do it!
8:10 Switches. osi level II
Learns where each device is connected.
(discovers the mac address)
15:30 Managed vs Unmanaged Switch
Managed: allows extensive config. See below.
18:00 Speed
10, 100, 1000 Mb connections (should match the device speed)
(managed) Set the hard code speed. If not, will do it automatically.
20:00 Duplex
Half-duplex: listen or talks. (one signal at a time).
Duplex: listen and talks (example: cellphone).
24:00 Backplain
Before reaching another port, data goes through the backplain.
It's like a highway. It needs to allow very high speed.
26:00 Trunk (for managed ports)
Connect multiple switches. Uses fiber cable.
28:40 VLAN
31:00 PoE
man you should be teaching my class. you would be my favorite teacher of all the time. great work eli you are the man!
You are incredible Eli. I'm currently interning at a company as an IT tech and even though I've heard about all these things and used some of them in practice; having you explain in baby steps what they do have been incredibly useful to me. You're creating jobs and helping us youngsters out. Thank you again, subbed!
Thank you SO much for your videos. I was referred by a friend who is a network engineer to watch your videos because I'm starting in the same field. You absolutely did not disappoint!
simple is always the best way to learn ,without complication .I say GOOD JOB ELI
Ahh!! This is so awesome, I love it. I can understand everything at the maximum speed and got to learn this in 20ish minutes. Great content!! Thank you!
I just found a solution to one of my problems with my network! I needed to separate the Access Point at my dad's restaurant so that the customers won't be able to see all the other devices in the network. Yeah, I have the same connection for the restaurant and our house so that our customers can have wifi for their devices.
Thank you so much dude, keep this awesome work up!
~Valk.
Eli, i love your videos man. You dont talk "DOWN" to people and you get the point across.
You have great teaching ability.
Thank you for your videos.
Got a big Job where i have to deploy a huge 20 IP cameras Surveillance System wich involves using Managed Switches, an i have never even touched a Switch before, this video came in very helpful...thank you, i like the warm way you explain, very sintetic
How do I force my mom to be half duplex?
+Jason Wenden go to change adapter settins -> double click your network card (wireless or ethernet) -> configure -> advanced -> Speed & Duplex -> click on Auto Negotiation and select your option
+Jason Wenden Vodka
cyka
Daniel À spinal
Give her a walkie talkie..
great video. My 7 year old sat through 46 min of the video right next to me, 30 min past his bedtime. He said he is really a good teacher!!
I would like to give Eli a standing ovation, I am new to the IT field and I learned more in the first 15 minutes of this video then anywhere else.
best part is you look into the history of where it started.. great.. nice
I am impressed by the amount of information you have provided. This was very informative. Thank you.
I just started to watch some of your videos and you have been awesome. I am an intermediate technology person, and have heard about the different topics you talk about, but I was never able to put them together. They way you put your videos together are now making sense, and one of the examples is how you talk about the portions belong to the ISO Model which I never understood. I know some of these videos are kind of outdated, and new technology is out, but your videos give an outstanding base for understanding from the root tot he top of the tree. You are AWESOME and thank you so much for doing these videos.
thank you Eli, I'm getting a revision I would have never got from anyone else, I studied Networking in 2009 and now it's 2016 I haven't got a job in Networking so listening to your lectures keeps me going.
Fantastic! I was trying to learn about switches using CISCO's documents and getting no where.
Your explanations are both easy to understand yet have incredible depth. Also your enthusiasm for the subject really shines through and makes the video way more interesting than the subject material would otherwise be.
You have my deepest gratitude for your commitment to helping others learn and I wish you the very best in all that life has to offer.
I wanted to say the exact same thing. Was looking everywhere for tutorials this simple yet efficient.
can you assign a switchport to more than one vlan?
Yes, depending on the vendor, we'd call that a trunk port (Cisco) or a tagged port (various other vendors).
Traffic is considerd in a VLAN typically based on ports. Port A can be configured to be in VLAN 10. All traffic entering the port is considered to be in the logical broadcast domain of VLAN 10. Here is a diffrent method. Layer 2 switches/bridges can also consider traffic in a VLAN based on its physical MAC address. If traffic from MAC address 01-01-01-01-01-01 enters on Port A it will be considered in VLAN 10. Now move the end station with that MAC address to Port B on the same switch. The switch will still consider the traffic in VLAN 10.
Eli, You're an incredible guy and I thank you, you have educated me faster and more effortlessly than anyone in any technical classroom could ever have!
You lay it out once... and it's all crystal clear to me!
YOU THE MAN!
Eli Is so good at Computers...You really are a Computer Guy and I am sure you know how to get people instructed about all this stuffs...You make it as easier as possible...Keep it up...You are a star!!!
this guy is really great I like his tutorials
"Hubs are bad, m'kay."
you are the only guy that explains everything. The good and bad.
everyone else just says plug the hub in.
I wanted to know if a hub has changes the ip. so I wouldn't affect my home network.
And that's why I'm taking your classes.
Thanks Eli!
Eli, like always, you have done and are doing a great job. You have heard this over and over. I like reading the comments when I am listing to your presentation. There is one very common thread; you are a great presenter and know how to teach your subject. Thank you again for spending so much of your time to teach us who are not so IT intelligent. I continue to view . . .
Very very very helpful information. Thank you so much.
"Hubs were completely dumb" this guy is awesome!!
Eli you are an amazing instructor. watching your videos make my life easy studying computer network at College .keep the hard work up .
In hadeth we have this " Stand up for the teacher and glorify him....He could have been a messenger. "
Thank you sir for breaking down switches. I am taking a networking class, and l am currently learning about switches. Reading the textbook, I didn't understand, but with this video I do. You should be a teacher.
I work as an IT Field Technician in 2018 and thought this video was pretty recent.
Love how you reiterate at the end. Helps reinforce the concepts =)
Just wanted to let you know, I currently am getting my network+ cert but the problem with these companies cert processes is they expect you to know a lot of terms previously when they start to teach you. Your videos are really helping me understand and connect the dots..LIFE SAVOR!
I'm learning network and security course. This video helps me a lot in understanding switchers and HUB. Brilliant tutor
0:04 - 0:05 That first sould scared the crap out of me!
Dude.... there is a vowel following the lead E.. its EE-ther-net (e as in tea) not eth-ur-net (not eth like in ethel)
This is one of the best educational video I have ever seen ... Just after 1 hour of watching this video, my knowledge is at a whole different level now ... yes, I do understand switches a lot better now ... thanks a lot for making this video.
Man i wish my school had teachers like you! I bet you've heard this a million times, but seriously...You make it so easy to understand, not like my dusty old teachers. I tend to search your videos for subjects we've had in class and suddenly, everything is much clearer! thank you very much for these videos!! keep it up :)
Most switches operate at layer 2 so they won't be packets that are sent there will be frames. I know there are some layer 3 switches as well but...........
Great catch! Eli needs to use the proper terms. He also said that hubs cause broadcast storms. While the congestion may be great and the holdoff times may interfere, that's not a broadcast storm. They are caused by loops in the network. Spanning Tree Protocol is used to stop them. computer.howstuffworks.com/lan-switch13.htm
Also Eeeethernet uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD) en.wikipedia.org/wiki/Carrier-sense_multiple_access_with_collision_detection not CA/CD WHICH DOESN'T EXIST. CSMA/CA is a different protocol often used in wireless networking. en.wikipedia.org/wiki/Carrier-sense_multiple_access_with_collision_avoidance. I can't listen any more to this guy if he is 'teaching' this incorrectly. I spent 25 years in networking and there is nothing wrong with cisco, but there is a lot of other high quality networking gear out there that I've worked with that costs a lot less and is just as good.
You do realize that eli is explaining to people who have no understanding of IT in technical depths. Save your b.s explanation foe your boss and stop being pedantic
45:09 that escalated quickly lol!
Man you are the best Computer guy on the world
you are really know how to introduce IT stuff and how to make it simple to understand .
Thank you so much
I feel your enthusiasm for networking. Your good vibes are contagious. Thank you for posting! You sir are full of win.
I need a Power over Wife if you can manage that kthx
+Joshua Ceres - ROFL! :-D
+Joshua Ceres Nah, you will get package collisions and create a broadcast storm and you will be reset.
@Joshua Ceres you mean power over Wi-Fi? they only make POE Power over Ethernet not over Wi-Fi
Use Cisco not Linksys, I thought Cisco now owned Linksys?
+Lee Platt They did own Linksys for a few years... they sold Linksys I believe to Belkin a year or two ago...
+Lee Platt Even when Cisco owned Linksys, Cisco was still the better piece of hardware. Personally, I've never considered Linksys "Enterprise" or even "Business" quality.
+Lee Platt NSA own Cisco buy sisco product you also may get them rigged by NSA
+PRO PLAYER Can't tell if you're trolling or if you honestly believe that.
There was somthing about it, in the snowden papers.
You are a Teacher's teacher! Your lectures are easily understood and right on point!
Can’t believe I actually watched the entire video. It is excellent learning for a newbie !
But but but...if I throw away my hubs, my wheels won't attach to my car! 😫
haha
Hm. Never heard Ethernet pronounced with the first syllable sounding like "Beth" instead of "teeth" before.
I wonder how he pronounces the word "ether".
Or ASUS. 13:07
"company officials told us a few years go that it should be pronounced ah-SOOS". Hmmm. Guess I've been pronouncing it wrong all along.
nevermind. It's supposed to be pronounced AY-soos. I know what, I'll not buy an ASUS so I don't have to worry about pronouncing it incorrectly.
When Eli says it, I hear like a soft "suze". It's rather confusing.
I pronounce it as "ass-oos".
The simple explications and definitions in which this guy goes into has been extremely helpful, and has helped very much within my BLANS report for college.
Thanks very much !!!
Just want to go back to school and have a teacher like you. I think, i will clap my hands each time the class will end. Well done.
Hi Eli! You are a god send man! Your way of explaining things makes everything simple and easy to grasp! Where were you all these days? I recently found you and since then my knowledge on IT is increasing! Thanx for helping people like me Eli! God bless you! Keep up the good work!
Great Class for the 70 year old. I have so much to learn. Thank you Eli.
Your such a great teacher, I can have your videos playing in the background and minimized and I still get pretty much everything you're saying just from the audio.
Great video Eli, very informative! I've had to painfully familiarize with switching in my current job. I thought I had it all figured out, and then they went ahead and developed SDN switches ..
I ran out of ports on my fiber optic terminal/router so I watched this video to understand switches. Thanks to what I learned in this video I went and bought the correct switch and my setup is running beautifully!
I came into this video thinking there was nothing more to learn about switches. I was incredibly wrong. Thank you for your video!
Eli, I just want to say that you are One of the Best Teachers on TH-cam..!!!
Great video, like most people I thought switches only connected network devices together so they can communicate with each other, didn't know they had so much functionality.
THIS GUY FORCES ME TO SIGN IN AND WRIGHT A BIG THANKS TO HIM. MAN YOU ARE SUCH A MANAGED SWITCH. I LOVE YOU ELI YOU ARE THE BEST.
Great video. I do enjoy how giddy he gets every-time he grabs the big switch. haha
Only people that really understands what they talk about can explain things like Eli... thanks man.
GREAT WORK u have helped a lot of people with these lessons & I'm one of them . I hope u continue uploading amazing videoes like this . LOV U
You're a very informative guy, and I have learnt a lot by watching your channel. Give youtube heaps as you're one of the good guys, and well worth subscribing to. I live in Oz, and have been told Netgear is the best manufacturer for our phone system. I now have what you call fibre cable, here FTTN; Fibre to the Node. Copper from Node to home.
@jgrabener hmmm... it really depends. Generally all modern networking equipment is full duplex. Standard Surveillance cameras using coax cable may or may not be. The PTZ system actually uses a different cable and controller then the video feed for movement. There are PTZ protocols, such as Pelco D, that specify how PTZ cameras operate.
Excellent. The time duration was daunting, but this was a genuinely enjoyable and easy to digest explanation that gave me the information I was looking for AND more. Not to mention leaving me curious about more hardware and software of networking.
cant stop watching more of your videos. Really helpful. Many thanks man
God bless this guy... I have learned so much without having any networking background
YOU ARE FAR MORE BETTER THAN ANY COMPUTER TECH
I AM WATCHING YOUR ALL LECTURES FROM THE VERY BEGINNING
Thanks for your Contribution
-K#####
Eli you are the best teacher ever i have encounter in my life .Hoping to get more PHP tutorials and m very excited to get more tutorials
your totally amazing instructor that i ever met on youtube..all of ur vedio are amazing
Hi Eli,
Found your videos last week and I am addicted to them now ! Information so well explained!! Will recommend these videos to everyone.
Thanks once again!
Miguel
Hey Eli, your videos are pretty helpful even for experienced people.
Great work! Thanks for sharing...
This was the best explanation of POE I have heard. THank you
I appreciate this video. I just earned my comp tia A+ and some of the info is familiar like half and full duplex, QoS, power over Ethernet. I also learned new things like spanning tree protocol, router loop, (un)managed switch, backplane, trunk connecters. I should take a network class and go for a network cert.
Great tutorial! Thanks much Eli! I've been a system admin for years but never learned things like the internals of managed switches. Very enlightening!
I'm studying to take my CompTIA Network + certification, your video is very helpful.
Thanks Eli
you should do version 2 of this and just talk about what has changed in technology from when this video was originally made.
Thanks for doing all these though.
trying to study for a BIS security test, helped me out a lot. Thanks you
Thank you. this was very helpful to me. I will definitely be watching more videos. I am the youth pastor at my church and i have been designated the staff "tech guy". your videos are very knowledgeable and professional.. .
Thank you very much Eli the Computer guy for helping me with this tutorial.
very informative video, I am following your networking videos from the very 1st one, this is the 6th one in the list and now I can say you have induced in me, a curiosity to learn more about networking....great work eli!!
Thanks Eli, you give great verbal presentations, I really enjoy your easy listening voice and knowledge. However as a science teacher, your use of the whiteboard, where we see only about one third of it, makes me wonder what do you wish to hide on the other two thirds. Aim for better diagrams.
Overall result 9/10. Could work harder. (HaHa)
Your videos are exactly what I have been looking for to learn about networking. Thanks a lot
I learn so much from you I don’t need to attend a networking class thank you sir
Eli if i get placed in campus interview its just because of u and whatever u have taught me through ur videos... Thank u soo much for ur excellent explainaions...
Eli your videos are very explicit i like that and they have helped me as well.
Thank you, great job dude keep on.
Great Videos. Keep it up. 1 thing I have found to be handy is the POE repeater. Using a POE switch, you can drive a POE repeater to run longer than 100Meters.
Thanks Eli - As usual and excellent tutorial. Thanks for taking the time to put this together
The loop story made my day: i immediately tested it on my 5 port switch and after 30 seconds of faster and faster blinking one of the computer said: no internet access. Magic!
pretty good, watched this 10 years after the upload and it fleshed out a lot of stuff
Eli- awesome as usual. Don't know what I would do without your great videos.