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!
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.
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 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
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
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
@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...
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?
@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.
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?
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...
hello MR.ELI ...i'm an employ in an internet service company working as Technical Support .... i always facing the problems that you mentioned in this video ...most of our customers always complaining for faults and always blame us for INTERNET problems but the reason is already from them ...they have bad connections devices or the router (home outer )is too old ...i just feel sick cause i saw how they are idiots and it's hard to explain to them cause they already judged us that the reason from our company ...dummies !!
Thanks for your videos, Eli. And this topic is veddy, veddy, VEDDY... Interesting... Possibly, the complainers and whiners are older people who remember "Ma Bell" in the golden, olden days, when the telephone company WAS responsible for EVERYTHING... from the switchboard exchange, thru the telephone poles, thru the in-house wires and wall jack, to the telephone itself, which the consumer only rented... did NOT own. Nowadays... older people just can't get their arms around the idea that they gotta hire a SEPARATE computer guy, to maintain the coax and ethernet cables, switches and routers... INSIDE yer humble abode... OR DIY = do it yoh-seff.
I have the opposite problem. My isp thinks they have the right to mess with my local network without permission when they (frequently) come out to fix their own problems.
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?
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.
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
Why dont big companies use wireless access point ( WiFi ) for their business to avoid Networking cables and big complex wirings and other hardware to cutoff the costing and maintain wirings..? Why they still use Ethernet connection in computers rather then WiFi ?if you read this please reply.
WiFi is great for Internet and light network usage, but not so great for a large number of users all trying to pull large amounts of data simultaneously. WiFi only allows 1 to 6 users to copy data simultaneously at half duplex (depending on the MiMo spec of the access point) Also you would still need to run a cable to each wireless access point anyway. But running cables let’s each user to copy data at 1000megabit full duplex all simultaneously.
What's the point of having a DMZ? I can't see a good reason as to why someone would need a portion of the network to be less secure.... is the less secure network easier/cheaper to build ?
(Sorry for my english) i think DMZ has been made for web server or FTP server, basically, all the servers which need to be often connected with outside. So, in order to protect our LAN, we used to forward TCP Packet from outside to the number 80 port of our webserver and not into our LAN.. => security !
The point of a DMZ is to segment your network. For example if your clients need to access your network for eCommerce, gaming, what have you. then you would set filters to allow them to access only certain servers. If those servers get hacked then it just minimizes the damage to those servers in that DMZ and the hacker won't be able to access the rest of your network. To set up a DMZ you would have a firewall in place. The firewall routes incoming internet traffic to your DMZ. Internet traffic can not route into your internal network due to filters setup on the firewall.
Memo Pony Router can also work as a switch. If it has more than one ethernet LAN port, it has a builtin switch. You just need to disable DHCP server on this router and set this router's IP to IP that isn't used in your network.
+Memo “MekoxTwiSparkle” Pony Router can connect to Router using crossover cable. Typical network connection is PC -> Switch -> Router (straight through cable) Cross over cable required for PC -> Router, or any like devices (switch -> switch, PC -> PC, router -> router) These days most devices use auto sensing so if this is turned on you don't need to worry bout cross overs (as I understand it)
+Memo “MekoxTwiSparkle” Pony IDF is essentialy an MDF but closer to computers at a higher floor... MDF is more close to ground. It is just the terminology but they are the same thing... of course there is a SWITCH at the IDF you are connecting everything!!! It is about the physical location.
Thanks So basically it depends on the capabilities of instruments purchased? It can be patch panel but depending upon its features it can also do some switching or other works
Prince Gupta The MDF & IDF are only terms used to describe a specific physical location. The MDF is the MAIN DISTRIBUTION FACILITY, i.e., as in a multi-story building, say ten (10) stories - On the first floor there will be a single room identified as the "data center" for that building. In that room will be placed all of the basic (core) IT hardware (switches, routers, SAN's, Servers, KVM switches, etc., etc.) for the entire building. In that room, all of the communication cabling that comes in from the world will enter the building into that room. This is where all of the IT cabling originates for the rest of the building and emanates from, throughout the rest of the building. The room I just described is the MDF (Main Distribution Facility). It is the core or center of the IT world for that building. From there, communications connections need to be distributed throughout the other nine (9) stories of the building to facilitate network connectivity. Now, the IDF (Intermediate Distribution Facility) is very similar to the MDF, however, it will likely on another higher floor of our ten story building, lets just say it is on the third (3rd) floor. Again, it will be a dedicated room where additional IT, as well as other comm equipment will be racked, installed and cabled. Into this room, all backbone cabling from the two lower floors will converge and be connected to additional switches, routers, etc., etc., just like on the first floor in the MDF. From this location, all of the computers, IP telephones and related IT hardware installed on floors 3 through 5 will distribute cabling and make their connections. Likewise, on the fifth (5th) floor there will be another IDF, with the same configuration of IT hardware racked, installed & cabled, as described above. And so it will go all the way up the building, until all floors have a connection to the essential hardware necessary to complete the network throughout the building. Each of these secondary rooms will be known as an IDF, with the first floor equipment room being the single and only MDF. In both instances, the MDF & IDF are the rooms in which all of the IT and often times all of the other communication equipment and cabling for the building will reside, not the actual hardware (switches, routers, SAN's, Servers, KVM switches). I hope this helps.
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
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!
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 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, :)
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.
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.
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.
Great class, clear definitions... mostly. For the life of me I cannot figure out what you're saying when you seem to be clearly referring to a G-Bik trunk port on a router. I thought you were kidding about the DMZ designation. It's nice to see a sense of humor in industry. (Then I found router on a stick and laughed out loud!) And, well, sorry, but.... for some reason it really bugs me... it's et cetera, not eck cetera. Thanks. Will be back for more!
Eli, if they provide any equipment ie: Modem or gateway, it's their responsibility, anything beyond ISP provided equipment is the customers responsibility
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!
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.
You Are The Man Eli
actually, he's the computer guy
god bless you Eli......you are an awesome teacher
Even the CCNA lecturer never talk about that! Thanks Eli
Your class is greatly appreciated! Clear, concise, even for an intermediate IT person. :)
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
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.
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
I like how cool you make IT.
You sir are an IT God! THANK YOU!
Your teaching style is great...really helping me out with advancement in my career. Thank you much for all of it!! :)
this is the video I have been looking for. Thank You
genuis.....i learn alot from your videos....thankyou
It would have been nice if you did separate video on DMZ. Physical --> Logical . Thank you, you are the best !
thank you for your lessons. i've been on intershipping program and your videos really helped me ..
Eli is the man for these vids 🤙🏻
I learned more here than 3 terms in my IT course... great stuff man
thank u I'm learning A lot from watching your videos , it really helps me in the IT filed , thank u
Since today, you had become my super teacher, (you are a hero!!!) A+++++++
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
Congratulations for the videos, Eli. They're awesome!
Thank you for sharing! A very very useful class indeed!
Very clear! Very helpful! Thanks!
In australia mdf and idf,s are md and fd,s. Main distributor and floor distributor.
Great stuff, thanks for sharing!
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
Thank u thank u thank u ! Great vid!
still full of information , Thanks I REQUEST YOU TO PLS MAKE A SERIES ONLY FOR CYBER SECURITY STUDENTS
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
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
@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...
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?
Awesome, you help me to prepare for my exam!
@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.
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?
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...
why wouldnt the MDF be on the bottom floor near the demarc point? I dont see why the 3rd floor wouldnt be an IDF
dude you the best
DMZ explanation was awesome
dude i love you!!! thanks for everything !!!
hello MR.ELI ...i'm an employ in an internet service company working as Technical Support .... i always facing the problems that you mentioned in this video ...most of our customers always complaining for faults and always blame us for INTERNET problems but the reason is already from them ...they have bad connections devices or the router (home outer )is too old ...i just feel sick cause i saw how they are idiots and it's hard to explain to them cause they already judged us that the reason from our company ...dummies !!
Thanks for your videos, Eli. And this topic is veddy, veddy, VEDDY... Interesting... Possibly, the complainers and whiners are older people who remember "Ma Bell" in the golden, olden days, when the telephone company WAS responsible for EVERYTHING... from the switchboard exchange, thru the telephone poles, thru the in-house wires and wall jack, to the telephone itself, which the consumer only rented... did NOT own. Nowadays... older people just can't get their arms around the idea that they gotta hire a SEPARATE computer guy, to maintain the coax and ethernet cables, switches and routers... INSIDE yer humble abode... OR DIY = do it yoh-seff.
I have the opposite problem. My isp thinks they have the right to mess with my local network without permission when they (frequently) come out to fix their own problems.
So... the MDF and IDF are racks of patch cable and patch panels?
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?
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
amazing. eli you are an amazing teacher
As always, Impressed
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z@ was nice eli.am glad to be your student.
So basically, a DMZ is used for unlocking ports that were blocked?
Thanks, man.
Also do you have to use fiber optic from IDF to MDF? Can cat 6 be used instead?
No doubt about it.
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
Thank you for sharing! A very very useful video
Why is mail server not in DMZ? You need to open ports for a mail server.
Hi sir thank you ...
thanks, this will be very usefull
Why dont big companies use wireless access point ( WiFi ) for their business to avoid Networking cables and big complex wirings and other hardware to cutoff the costing and maintain wirings..? Why they still use Ethernet connection in computers rather then WiFi ?if you read this please reply.
WiFi is great for Internet and light network usage, but not so great for a large number of users all trying to pull large amounts of data simultaneously. WiFi only allows 1 to 6 users to copy data simultaneously at half duplex (depending on the MiMo spec of the access point)
Also you would still need to run a cable to each wireless access point anyway.
But running cables let’s each user to copy data at 1000megabit full duplex all simultaneously.
LOL Nightmare!! You're the man Eli..
Thanks. I learned a lot in this video :-)
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
Thank you for those very useful videos.
Nice lesson.
love u Eli
What's the point of having a DMZ? I can't see a good reason as to why someone would need a portion of the network to be less secure.... is the less secure network easier/cheaper to build ?
(Sorry for my english)
i think DMZ has been made for web server or FTP server, basically, all the servers which need to be often connected with outside. So, in order to protect our LAN, we used to forward TCP Packet from outside to the number 80 port of our webserver and not into our LAN.. => security !
The point of a DMZ is to segment your network. For example if your clients need to access your network for eCommerce, gaming, what have you. then you would set filters to allow them to access only certain servers. If those servers get hacked then it just minimizes the damage to those servers in that DMZ and the hacker won't be able to access the rest of your network. To set up a DMZ you would have a firewall in place. The firewall routes incoming internet traffic to your DMZ. Internet traffic can not route into your internal network due to filters setup on the firewall.
Thank you.
Thanks A lot Big Man
thank you!! i understand more now
Is the IDF essentially a switch? just curious. Can a router be connected to another or router or do you really need to connect it to the switch?
Memo Pony Router can also work as a switch. If it has more than one ethernet LAN port, it has a builtin switch. You just need to disable DHCP server on this router and set this router's IP to IP that isn't used in your network.
+Memo “MekoxTwiSparkle” Pony Router can connect to Router using crossover cable. Typical network connection is PC -> Switch -> Router (straight through cable) Cross over cable required for PC -> Router, or any like devices (switch -> switch, PC -> PC, router -> router) These days most devices use auto sensing so if this is turned on you don't need to worry bout cross overs (as I understand it)
+Memo “MekoxTwiSparkle” Pony IDF is essentialy an MDF but closer to computers at a higher floor... MDF is more close to ground. It is just the terminology but they are the same thing... of course there is a SWITCH at the IDF you are connecting everything!!! It is about the physical location.
Joel Colon
Thank you so much. :) These terminologies can be so confusing being a student.
Whatever happened to Eli the PC guy?
Nice Lesson...
Hey Eli thanks for the video. How exactly does one go about testing a demarc point?
google: "how to test a demarc point" and you're on your way.
thanks man.
Thanks
hi i got a mdf and 2 idf in my house i am runing up to 21 devices
Eli the Computer Guy you live in baltimore ?
yeah sir . you can make some videos of CCNA.!! it will more useful for every students..!!!
To me MDF and IDF appear like switches, are they?
Thank you both for your replies.
But I think there is still no solid conclusion..
Thanks
So basically it depends on the capabilities of instruments purchased?
It can be patch panel but depending upon its features it can also do some switching or other works
Prince Gupta
The MDF & IDF are only terms used to describe a specific physical location.
The MDF is the MAIN DISTRIBUTION FACILITY, i.e., as in a multi-story building, say ten (10) stories - On the first floor there will be a single room identified as the "data center" for that building. In that room will be placed all of the basic (core) IT hardware (switches, routers, SAN's, Servers, KVM switches, etc., etc.) for the entire building. In that room, all of the communication cabling that comes in from the world will enter the building into that room. This is where all of the IT cabling originates for the rest of the building and emanates from, throughout the rest of the building.
The room I just described is the MDF (Main Distribution Facility). It is the core or center of the IT world for that building.
From there, communications connections need to be distributed throughout the other nine (9) stories of the building to facilitate network connectivity.
Now, the IDF (Intermediate Distribution Facility) is very similar to the MDF, however, it will likely on another higher floor of our ten story building, lets just say it is on the third (3rd) floor.
Again, it will be a dedicated room where additional IT, as well as other comm equipment will be racked, installed and cabled. Into this room, all backbone cabling from the two lower floors will converge and be connected to additional switches, routers, etc., etc., just like on the first floor in the MDF. From this location, all of the computers, IP telephones and related IT hardware installed on floors 3 through 5 will distribute cabling and make their connections.
Likewise, on the fifth (5th) floor there will be another IDF, with the same configuration of IT hardware racked, installed & cabled, as described above.
And so it will go all the way up the building, until all floors have a connection to the essential hardware necessary to complete the network throughout the building. Each of these secondary rooms will be known as an IDF, with the first floor equipment room being the single and only MDF. In both instances, the MDF & IDF are the rooms in which all of the IT and often times all of the other communication equipment and cabling for the building will reside, not the actual hardware (switches, routers, SAN's, Servers, KVM switches).
I hope this helps.
Thanks a lot :)
+Prince Gupta YOU NAILED IT!!!!
Oh yeah and you remind me a lot of the wrestler CM Punk
yeah i dont play around the "im 2 busy to reply" game
Mdf,s arefor telephony
if you know how to cable test and understand patch panels then you can isolate any physical problem pretty much. f the property manager.
100%
i request u sir .try to provide ccna course lessons videos
Segmentation * typo in the title ;)
Google this: projecthoneypot
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
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!
Must be easy if he can talk about it after a few too many beers.
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?
Generally the answer is yes...
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 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, :)
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.
omg thank you very much! I googled a lot but could not find smth better than this! Everything is clear for me now!
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.
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.
Great class, clear definitions... mostly. For the life of me I cannot figure out what you're saying when you seem to be clearly referring to a G-Bik trunk port on a router.
I thought you were kidding about the DMZ designation. It's nice to see a sense of humor in industry. (Then I found router on a stick and laughed out loud!)
And, well, sorry, but.... for some reason it really bugs me... it's et cetera, not eck cetera.
Thanks. Will be back for more!
Eli, if they provide any equipment ie: Modem or gateway, it's their responsibility, anything beyond ISP provided equipment is the customers responsibility