Eli, thanks so much for the lectures. I've been following you for some time now. You've really made lots of things clear. Things I didn't understand in class. You've given me confidence to continue my education. I loose hope completely thinking that I wasn't going to be able to make it out there. I'm going to be in touch with you and follow all your classes. Thanks and may God Bless You And The Work You Are Doing.
Thumbs up to you Eli, the computer guy. I really appreciate you because you have great skills of educating. Your tutorials are clear and very informative and can help everyone understand the basic concepts of networking and other stuff involved. Thank you much and keep going because millions around the world will benefit from your knowledge. May God help you with all that you need for helping us learn this way. I'm glad!
Thank you for taking the time to upload your knowledge. I have now finally figured out what I want to commit to studying for in college. You sir are arming me with the knowledge I need so when I take my first steps on to the classroom I will not be completely lost and overwhelmed. Thank you!
University lectures, IT lecturers in particular, must hate the internet and guys like Eli because they (guys like Eli) are better teachers and can explain it in a way in which it boosts your confidence. This has caused the demystification of IT and I love it. Keep at Mr.Eli.
Eli, again great job. I found you less than a week ago, but have watched several hours of your early training videos on Networking. As all the other comments, Great Job. You make it so clear. This does help learn the process.
Eli you're spot on about college classes and certifications leaving out this information. GREAT TUTORIAL . Now I have a good basic overview of the big picture.
You are a fantastic teacher sir. I'm very thankful I came across your videos. You have a way of teaching that is very easy to follow and understand. The fact that you don't charge a dime for these videos is incredible. Thank you from the bottom of my heart for being so damn awesome.
As always, very informative and easy to follow. I'm working my way through all of these. Thanks! I really like the "What we're going to cover" then the meat of it and the recap. Great teaching techniques.
you are my hero,... first found you through college class,... you are amazing and are so clear in your descriptions.... subscribed! love your stuff with kali and networking!!
You have explained all the Terms very easily & unfortunately these are not taught in Certification classes any more... So these are Top Videos:) Thank you
Very good job with ur tutorials. I was looking for some basic networking knowledge n i suppose u've saved me a couple 100 $s. many thanks n heres hoping get better
Hi Eli, at 20:45 you are mentioning that each computer is connected to a patch panel and that patch panel is connected to a switch which goes to the MDF. My question is, why would you use the switch? Couldnt you just connect the patch panel directly to the MDF?? Thanks in advance for your answer :)
John Bitzios even if you use patch panel you will always need switch. you will need to link inch patched cable to a port on your switch with a short cable.
Think of a patch panel as a power strip. The power strip let's you plug six devices into one outlet. But it doesn't boost or renew the power available, and neither does a patch panel. A switch, on the other hand, literally reads the data being sent one one cable and retransmits it to the correct destination. That's why a switch can take 100 cat5 lines and funnel it into a fiber cable. Once the switch retransmits the data packet, it's essentially resetting the transmission quality back to the beginning. It also conveniently translates your Ethernet signal from the cat5 "language" to the fiber optic "language" because fiber and copper actually can't "talk" directly to each other.
Great video! Regarding DMZ, can't you accomplish the same thing on one router using VLANs? For instance I did a job for a small business where I setup a single wireless router with a VLAN for their internal network and a VLAN for their guest network and disabled inter-vlan routing. Does this not accomplish the same thing?
Eli, if they provide any equipment ie: Modem or gateway, it's their responsibility, anything beyond ISP provided equipment is the customers responsibility
I know these where made in 2011, but my modem/router provided to me can do am DMZ inside of it, so I wonder do I need to do the 2 router way or just one when the modem/router can do the DMZ from the provider( time warner). an explanation on a setup MZ with the provider modem/router would be nice. thanks , love the videos, just this question, :)
@grimlord5654 Technically Yes.... I would feel better if it was actual Cat 5 Cable run though... Powerline is VERY good, but not AS good as a standard cable run...
Do switches boost the signal? You stated that you don't want to run cables further than 100m. So let's say you run a 100m cat5 cable from a work station to the IDF and it gets plugged into a switch. Then let's say you run another 100m cat5 cable down to the MDF so you are now at a total distance of 200m from the workstation to the MDF. Will you experience signal degradation since the total distance is 200m or does the switch boost the signal so that it can reach that 200m without problems?
When the signal gets to the switch, the switch then sends the signal to the MDF. So essentially, it's not the same signal being sent. It's a new signal with the same data being sent to the MDF, does that make sense?
Chris Vester If you recall, at min 18:06, Eli talked about the Switch using Gbic connectors (which uses a fiber cable). Fiber optic max distances can range from 220m up to 100km as shown in Table 1 of this link www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/product_data_sheet09186a008014cb5e.html So, you are not running another CAT 5 from the IDF, instead you are running a fiber optic cable carrying a fresh signal from the switch and you will consequently have no problems with signal loss (if you choose the appropriate fiber cable type)
+Chris Vester If you plug into a SWITCH at IDF with a 100m cat5 then the SWITCH will regenerate and boost that signal. This means you start at the IDF with a CLEAN and POWERFUL new signal. When the other 100m segment reach at MDF you don't have to worry about a 200m run because the real thing is that you have 2 segments of 100m with a SWITCH between them boosting the signal... ok I am getting redundant here... hehehe ... to the point... YOU WONT EXPERIENCE SIGNAL LOSS
In the hotel DMZ example, I'm struggling to understand why the 'mission critical' computers would want to be connected to the internet at all if all the internet ports (e.g. :80) are blocked?
Eli can you please answer a question for me please. I am a student working on getting my AS and than will go for my BA. Anyway with the DMZ zone the part that is open to possible attacks you have the switch here and the second router that is super secure is connected to the first switch, is there a second switch connected to that second router for the APs to connect the rest of the LAN such as computers and printers and servers that need extra security. and what is the IP format for the first router and switch and second switch in a Subclass C address format. i am designing a wireless WLAN for a business 3 floors and 200 clients
@anzwertree You just setup a system and intentionally leave it vulnerable to attack... You then analyze to log files and see the strategy hackers are using to hit the system and then use that to harden your "real" systems that you care about.
Stupid question alert - Once the cables have come into the property and you have your MDF set and let's say you have, for example, 100 computers on 2 floors. would you need more than one phone socket to share the internet? If not how many would you have? Is it your responsibility to "split" a cable coming from the wall to create more telephone line sockets internally?
Hi Eli Im Lucas ,i watched one of your Videos and it was super clear to me. Can you please give us lecture on Secure Network Architecture? i hope you do it soon.Thanks Eli
I still got an issue with understanding DMZ. So, what i learned is that DMZ is not and physical appliance, is not a configuration on a router or a switch. But, it is a kind of an idea. so that a few action and configuration creates DMZ in a network ? are those configuration made in a router or a switch or both to create DMZ? second, when you have, let say 10 IDF and you want to connect them to MDF, the connection will be made with fiber optic cables. so you want to plug in 10 fiber optic cables to a patch panel inside the MDF? what kind of hardware is gathering it whole 10 fiber optic cables to MDF switch?
The DEMARC is usually where your ISP enters the building. But yes the modem is usually going to be located at the DEMARC location. FYI, you can own your own modem and save yourself a few bucks a month.
Hi Eli....You are great mentor no doubt in that i have been learning many thing from your lectures...Is there a way put all together in a sequential order so can go one after other..Or unique ID next to course...
Hi Eli, i have a small doubt, Am trying to understand what is a "Network backbone"? Can i take the Demarc point as the network backbone?.. And this training video gave me a clear picture on how network segments works. Thanks alot.. :D
Let's say that you have a building of 3 floors, The MDF is going to be in the 2ed floor, the furthest machine in the (1st or 3rd floors) that has to be connected to the MDF is less than 100 meters, do i patch all the devices directly to the MDF, or it is better to install an IDF in each floor.
Hi Eli, I saw your video on Net balancing on individual computers. Do you already have LAN network or Domain Net balancing, especially the one that deals with Internet bandwidth restrictions and distribution? We are using Windows Server 2012 and connected to 16 Mbps DSL which is the only available service we have in our area and our internet connection slows down when our 110 computers are connected to the Internet. Thanks
Hi Eli GOD BLESS YOU i would like to see some basic' very basic' fundamentals of networking videos.becoz without having knowledge of all this basic things we can't understand what is DNS or what is Physical segmention or VPN. so suggestion from my side will be like u can create videos like what is i.p address, what is subnet mask,what is port, what is bandwidth etc. so please make this videos for people like me. then it will be better to understand High concept of networking. please reply
Eli, thanks so much for the lectures. I've been following you for some time now. You've really made lots of things clear. Things I didn't understand in class. You've given me confidence to continue my education. I loose hope completely thinking that I wasn't going to be able to make it out there. I'm going to be in touch with you and follow all your classes. Thanks and may God Bless You And The Work You Are Doing.
Thumbs up to you Eli, the computer guy. I really appreciate you because you have great skills of educating. Your tutorials are clear and very informative and can help everyone understand the basic concepts of networking and other stuff involved. Thank you much and keep going because millions around the world will benefit from your knowledge. May God help you with all that you need for helping us learn this way. I'm glad!
Thank you for taking the time to upload your knowledge. I have now finally figured out what I want to commit to studying for in college. You sir are arming me with the knowledge I need so when I take my first steps on to the classroom I will not be completely lost and overwhelmed. Thank you!
University lectures, IT lecturers in particular, must hate the internet and guys like Eli because they (guys like Eli) are better teachers and can explain it in a way in which it boosts your confidence. This has caused the demystification of IT and I love it. Keep at Mr.Eli.
god bless you Eli......you are an awesome teacher
You Are The Man Eli
actually, he's the computer guy
I know right! I have been studying IT for years and I have never come across someone that explains complicated things so well.
Eli, again great job. I found you less than a week ago, but have watched several hours of your early training videos on Networking. As all the other comments, Great Job. You make it so clear. This does help learn the process.
Eli you're spot on about college classes and certifications leaving out this information. GREAT TUTORIAL . Now I have a good basic overview of the big picture.
no kidding, I'm a computing security major and this was never taught to me in my networking classes
Your class is greatly appreciated! Clear, concise, even for an intermediate IT person. :)
You are a fantastic teacher sir. I'm very thankful I came across your videos. You have a way of teaching that is very easy to follow and understand. The fact that you don't charge a dime for these videos is incredible. Thank you from the bottom of my heart for being so damn awesome.
Man, you repeat a lot things. But it's exactly what I need to get those things in my head. Thank you very much for your work.
Thank you for another great lesson. I am learning so much because of your great clarity. I can't get enough of your videos. You are the master teacher
Even the CCNA lecturer never talk about that! Thanks Eli
omg thank you very much! I googled a lot but could not find smth better than this! Everything is clear for me now!
Eli is an awesome teacher. I like that he laughs at his mistakes. I learn as well.
As always, very informative and easy to follow. I'm working my way through all of these. Thanks! I really like the "What we're going to cover" then the meat of it and the recap. Great teaching techniques.
Thanks ELI, i am working since long but now i have got cleared about these concepts.
2020 and still no one can explain these stuff as you do, thanks
genuis.....i learn alot from your videos....thankyou
you are my hero,... first found you through college class,... you are amazing and are so clear in your descriptions.... subscribed! love your stuff with kali and networking!!
Watching this in March of 2021. I just realized it's possible you've been on TH-cam longer than Louis!
Your teaching style is great...really helping me out with advancement in my career. Thank you much for all of it!! :)
I like how cool you make IT.
Eli, thanks for helping me realize How Important Networking is to anyone in IT + how this ties into system admin (specifically windows server 12)!
You have explained all the Terms very easily & unfortunately these are not taught in Certification classes any more... So these are Top Videos:) Thank you
Thank You brotha, I currently work in a school, Totally understood your explanation of M/IDF.
I learned more here than 3 terms in my IT course... great stuff man
this is the video I have been looking for. Thank You
Since today, you had become my super teacher, (you are a hero!!!) A+++++++
thank u I'm learning A lot from watching your videos , it really helps me in the IT filed , thank u
Very good job with ur tutorials. I was looking for some basic networking knowledge n i suppose u've saved me a couple 100 $s. many thanks n heres hoping get better
You sir are an IT God! THANK YOU!
Thanks for the great tutorial Eli. Clear explanations delivered well. Appreciated.
thank you for your lessons. i've been on intershipping program and your videos really helped me ..
Thank you for sharing! A very very useful class indeed!
Congratulations for the videos, Eli. They're awesome!
I just gotta say your presentations are awesome keep them coming!
Eli is the man for these vids 🤙🏻
Great video subscribed and about to binge watch!👍
amazing explanation , greetings from Mexico
Great stuff, thanks for sharing!
It would have been nice if you did separate video on DMZ. Physical --> Logical . Thank you, you are the best !
Hi Eli, at 20:45 you are mentioning that each computer is connected to a patch panel and that patch panel is connected to a switch which goes to the MDF. My question is, why would you use the switch? Couldnt you just connect the patch panel directly to the MDF??
Thanks in advance for your answer :)
John Bitzios even if you use patch panel you will always need switch.
you will need to link inch patched cable to a port on your switch with a short cable.
Thanks for answering my friend. The reason for it?? Is it because of amplifying the signal ?
Think of a patch panel as a power strip. The power strip let's you plug six devices into one outlet. But it doesn't boost or renew the power available, and neither does a patch panel.
A switch, on the other hand, literally reads the data being sent one one cable and retransmits it to the correct destination. That's why a switch can take 100 cat5 lines and funnel it into a fiber cable.
Once the switch retransmits the data packet, it's essentially resetting the transmission quality back to the beginning. It also conveniently translates your Ethernet signal from the cat5 "language" to the fiber optic "language" because fiber and copper actually can't "talk" directly to each other.
Awesome, you help me to prepare for my exam!
Outstanding.. great presentation and very simple
Great video! Regarding DMZ, can't you accomplish the same thing on one router using VLANs? For instance I did a job for a small business where I setup a single wireless router with a VLAN for their internal network and a VLAN for their guest network and disabled inter-vlan routing. Does this not accomplish the same thing?
Eli, if they provide any equipment ie: Modem or gateway, it's their responsibility, anything beyond ISP provided equipment is the customers responsibility
Excellent tutorial. Thanks a lot, Eli.
In australia mdf and idf,s are md and fd,s. Main distributor and floor distributor.
dude you the best
DMZ explanation was awesome
I know these where made in 2011, but my modem/router provided to me can do am DMZ inside of it, so I wonder do I need to do the 2 router way or just one when the modem/router can do the DMZ from the provider( time warner). an explanation on a setup MZ with the provider modem/router would be nice. thanks , love the videos, just this question, :)
dude i love you!!! thanks for everything !!!
@grimlord5654 Technically Yes.... I would feel better if it was actual Cat 5 Cable run though... Powerline is VERY good, but not AS good as a standard cable run...
Your videos are Gold!
amazing. eli you are an amazing teacher
Do switches boost the signal? You stated that you don't want to run cables further than 100m. So let's say you run a 100m cat5 cable from a work station to the IDF and it gets plugged into a switch. Then let's say you run another 100m cat5 cable down to the MDF so you are now at a total distance of 200m from the workstation to the MDF. Will you experience signal degradation since the total distance is 200m or does the switch boost the signal so that it can reach that 200m without problems?
When the signal gets to the switch, the switch then sends the signal to the MDF. So essentially, it's not the same signal being sent. It's a new signal with the same data being sent to the MDF, does that make sense?
RoyalSwish yes
Chris Vester If you recall, at min 18:06, Eli talked about the Switch using Gbic connectors (which uses a fiber cable). Fiber optic max distances can range from 220m up to 100km as shown in Table 1 of this link www.cisco.com/c/en/us/products/collateral/interfaces-modules/gigabit-ethernet-gbic-sfp-modules/product_data_sheet09186a008014cb5e.html
So, you are not running another CAT 5 from the IDF, instead you are running a fiber optic cable carrying a fresh signal from the switch and you will consequently have no problems with signal loss (if you choose the appropriate fiber cable type)
Chris Vester IMO if that wasn't possible then the whole internet would have to be in circle with r=100m ;)
+Chris Vester If you plug into a SWITCH at IDF with a 100m cat5 then the SWITCH will regenerate and boost that signal. This means you start at the IDF with a CLEAN and POWERFUL new signal. When the other 100m segment reach at MDF you don't have to worry about a 200m run because the real thing is that you have 2 segments of 100m with a SWITCH between them boosting the signal... ok I am getting redundant here... hehehe ... to the point... YOU WONT EXPERIENCE SIGNAL LOSS
In the hotel DMZ example, I'm struggling to understand why the 'mission critical' computers would want to be connected to the internet at all if all the internet ports (e.g. :80) are blocked?
Eli can you please answer a question for me please. I am a student working on getting my AS and than will go for my BA. Anyway with the DMZ zone the part that is open to possible attacks you have the switch here and the second router that is super secure is connected to the first switch, is there a second switch connected to that second router for the APs to connect the rest of the LAN such as computers and printers and servers that need extra security. and what is the IP format for the first router and switch and second switch in a Subclass C address format. i am designing a wireless WLAN for a business 3 floors and 200 clients
@anzwertree You just setup a system and intentionally leave it vulnerable to attack... You then analyze to log files and see the strategy hackers are using to hit the system and then use that to harden your "real" systems that you care about.
Stupid question alert - Once the cables have come into the property and you have your MDF set and let's say you have, for example, 100 computers on 2 floors. would you need more than one phone socket to share the internet? If not how many would you have? Is it your responsibility to "split" a cable coming from the wall to create more telephone line sockets internally?
i watched your vids and im so over prepared for class its great getting a cisco cert. the middle one is that good? and also is security + good to get?
ELI u r the best all the time keep it up
As always, Impressed
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Thanks a lot for your generosity in sharing !
you are amazing
Very clear! Very helpful! Thanks!
Stupid question. Does the demarc connect to a modem then the modem goes to a router? Pretty much like your typical home?
So... the MDF and IDF are racks of patch cable and patch panels?
Hi Eli Im Lucas ,i watched one of your Videos and it was super clear to me. Can you please give us lecture on Secure Network Architecture? i hope you do it soon.Thanks Eli
still full of information , Thanks I REQUEST YOU TO PLS MAKE A SERIES ONLY FOR CYBER SECURITY STUDENTS
I still got an issue with understanding DMZ. So, what i learned is that DMZ is not and physical appliance, is not a configuration on a router or a switch. But, it is a kind of an idea. so that a few action and configuration creates DMZ in a network ? are those configuration made in a router or a switch or both to create DMZ?
second, when you have, let say 10 IDF and you want to connect them to MDF, the connection will be made with fiber optic cables.
so you want to plug in 10 fiber optic cables to a patch panel inside the MDF? what kind of hardware is gathering it whole 10 fiber optic cables to MDF switch?
The DEMARC is usually where your ISP enters the building. But yes the modem is usually going to be located at the DEMARC location. FYI, you can own your own modem and save yourself a few bucks a month.
z@ was nice eli.am glad to be your student.
why wouldnt the MDF be on the bottom floor near the demarc point? I dont see why the 3rd floor wouldnt be an IDF
Hi Eli....You are great mentor no doubt in that i have been learning many thing from your lectures...Is there a way put all together in a sequential order so can go one after other..Or unique ID next to course...
In respective to DMZ, is that how companies set up guest services?
You have done a great job!
Can you daisy chain IDFs as you are coming down the floors and just run one wire to the MDF?
is it ok to use a Powerline Ethernet adopter between mdf to idf in the same building, just to eliminate network wiring?
Generally the answer is yes...
Hi Eli, i have a small doubt, Am trying to understand what is a "Network backbone"? Can i take the Demarc point as the network backbone?.. And this training video gave me a clear picture on how network segments works. Thanks alot.. :D
thank you for this wonderfull presentation.
Let's say that you have a building of 3 floors, The MDF is going to be in the 2ed floor, the furthest machine in the (1st or 3rd floors) that has to be connected to the MDF is less than 100 meters, do i patch all the devices directly to the MDF, or it is better to install an IDF in each floor.
I think You don't need to install any IDF
He says said each building's IDF was "connected"....how..? with cable or wirelessly with bridged units? just curous?
Hi Eli,
I saw your video on Net balancing on individual computers. Do you already have LAN network or Domain Net balancing, especially the one that deals with Internet bandwidth restrictions and distribution? We are using Windows Server 2012 and connected to 16 Mbps DSL which is the only available service we have in our area and our internet connection slows down when our 110 computers are connected to the Internet. Thanks
Also do you have to use fiber optic from IDF to MDF? Can cat 6 be used instead?
Hi Eli GOD BLESS YOU
i would like to see some basic' very basic' fundamentals of networking videos.becoz without having knowledge of all this basic things we can't understand what is DNS or what is Physical segmention or VPN. so suggestion from my side will be like u can create videos like what is i.p address, what is subnet mask,what is port, what is bandwidth etc.
so please make this videos for people like me. then it will be better to understand High concept of networking. please reply
You are the best dude... thank you
U make me loving theNetworks Data Cable Installation.
I ask if there any free training programs.
I want to learn practily
In New York
Sorry
Thank u thank u thank u ! Great vid!
Thank you for sharing! A very very useful video
Thanks. I learned a lot in this video :-)
good teacher to say the least,he should be next president
Great class Eli!
What type of physical piece of gear distributes data from MDF to all the IDFs using trunking on gbic?
PS- Thank you so much for these videos...they are phenomenal
So basically, a DMZ is used for unlocking ports that were blocked?
Why is mail server not in DMZ? You need to open ports for a mail server.
Thank you for those very useful videos.
best answer on youtube
Thanks A lot Sir, found it 100% usefull, but would like to hear a little more about DMZ please,
brother ya te explico yo, cuando te haga falta jejeje, aunque aqui tengo muchos videos de Elli very usefull
bueno ven pa aca para que me expliques dale