MDF, IDF, Demarc and Demarc Extension

Video Activity

MDF, IDF, Demarc and Demarc Extension This lesson covers different components of wiring distributions. These are things we need to be aware of in case we are asked questions about certain things on the network. They are also useful to know for the Network Plus exam: Main Distribution Frame (MDF): This is the main network rack and manages Intermedia...

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31 hours 29 minutes
Video Description

MDF, IDF, Demarc and Demarc Extension This lesson covers different components of wiring distributions. These are things we need to be aware of in case we are asked questions about certain things on the network. They are also useful to know for the Network Plus exam:

  • Main Distribution Frame (MDF): This is the main network rack and manages
  • Intermediate Distribution Frame (IDF): network racks connect to backbone
  • Demarc: where ISP enters building
  • Demarc extension: extension from demark to Main Distribution Frame (MDF)
Video Transcription
Hi and welcome to Cyber Eri. My name's Anthony and I'm your local subject matter expert for a network Plus and today we're gonna be talking about different components of wiring distributions. So we're talking about the cabling in the infrastructure inside of our local area network environment. There's a few major terms that we need to be familiar with.
These are not necessarily individual devices,
but there are places and their locations, and they are device types that are placed in our network that we need to be aware of in case they're referred to. We may have an Internet service provider that asks. This asks us to go check this point, or we may be a talking to another
network engineer who tells us that we need to check out an issue that could potentially be
in this location. So we need to understand. And we need to know what to look for in these different in our land environment in our network environment and understand our different aspects of our different cable ings.
one of our major parts of our network is going to be our MDF, also known as our short four main distribution frame Now, our main distribution frame is essentially our main network rack, our main network closet, where we're connecting all of our different network segments.
And we also are connecting them to our Demark. We're connecting them out to the Internet.
So our MDF is typically going to be. It's going to be our big main network closet where we have our connection to the Internet go from our internal network to an external network. We may have multiple routers coming in from different backbones throughout our network. It's gonna be a major part of our network.
In addition to our MDF, we also have an idea, and our IVF stands for intermediate distribution frame. Now,
if we take a look at our building, then our MDF is going to sort of be our main headquarters while our I. D. S is our little branch branch office network closets, their network closets that sit right off of our that connected to our backbone infrastructure.
And they're going to disperse to a certain floor or a certain main department.
So imagine that we have our we have our building here, and our building has
four separate floors now on our ground floor level we actually have. So we'll say we have ah, basement layer. So on our ground floor level or ground floor is where our Internet comes in from our provider, it's just called Our Demark are demarcation point, which we'll talk about a little bit more in a second.
But we have the Internets. Coming from our provider are Demark point
and then right near our Demark point, we have our main network closet
and in our main network closet we have a lot of heavy, heavy duty routers we have we have some of our main backbone switches. We may have some VP in con VPN concentrators which allow people to get in from the outside and be able to
connected using a VPN into our internal network. This is going to be our main big network junction,
we also may call it a main our main cross connect.
So we have our big MDs now from our MBf
going up
to our fourth floor
and down to our lower level.
We have our main backbone infrastructure
and our backbone is going to be some of our is going to be some of our what our cabling That's going to carry data faster. Maybe through our backbone. We use some sort of we use a multi mode fiber connection. Or maybe we use a cat six a cabling or we use some heavy, heavy deco axel cabling
are a backbone is going to be our
information highway there that we have,
ah, lot more data connecting into than just a standard cable into the wall.
So we have our Internet backbone or we have our main local area network backbone now off of this local area backbone. We don't want to just connect in individual work stations. To this. We may need to have separate V lands when we need to have some segmentation. And that's going to be the job of our idea. FS
or I D efs.
Our intermediate distribution frames maybe located on each floor.
So we have 1/4 floor network closet, 1/3 floor network closet,
our second floor, third floor and lower level network closet.
And these actors are idea ups. We may even have a
IVF which branches off on our first floor off of our main distribution frame. If we want to keep things a little bit set more segmented we say, OK, we want to keep all of our IVF identical for each floor. So we're going to create a separate idea on our first floor and have that connect to our India, our main distribution frame.
So then we have all of our backbone connections going from our MDF to our idea. It's our intermediate distribution frames.
And then at our intermediate distribution frames, these we're going to be the switches and patch downs and punch down blocks that are going to send our network connections.
Two are different offices and individual work stations.
So this is going to
then branch off
like so.
So again, we almost think of our MDF as our main headquarters and our I. D. S are little branch offices and our backbone we can think of as, like our one of our information highways. And then we have coming off of our I. D. S. We have some of our side roads. We have some of our non major roads
that connect into our major highway that goes to our India.
that's gonna be the purpose of our main distribution frame and our intermediate distribution frames again. Main distribution frames being those those connections that connect going to connect our multiple i d EFs and allow them to connect to our Demark point. So what's our Demark point? I've mentioned that enough times now.
Well, our Demark point is short for our point of demarcation
in our point of demarcation is where the Internet service provider it comes into our building. That's the point of demarcation is the point where the responsibility of the network and the responsibility of the service provider goes from the Internet service provider to us, the point of demarcation.
That's where they, the authority of the network, transfers to us.
If we're having Internet connectivity issues from about one of our workstations and a Internet service provider technician comes out, they plug into the demarcation point. And they say our network is good at this point. The Internets entering your building and it's just fine right here. It's the network administrator. It's your responsibility
to figure out what's gone wrong between this point to the work station.
So the point of demarcation is going to be
where the network enters our building.
It's going to be were the ownership transfers from our Internet service provider to us
now. Sometimes where that network enters our building isn't where we want it to connect to our main distribution frame. Maybe it's on the other side of the building for months. Maybe our main distribution frame is on the top floor, and the in the demarcation point is at the bottom floor.
But we don't have a main distribution frame. That's right where that demarcation point is.
In this case, we may want our Internet service provider to provide a demarche extension. A demarche extension is sort of like a. We allow the Internet service providers to come in and do more than just
connect the Internet into our building. They're also going to make a connection from the D Mark point from the D mark point to our main distribution frame. Now this may come with an extra cost. This may come with some time and some effort on their part for them to run that Demark extension.
But what it's allowing us to do is it's keeping the ownership and keeping the responsibility
of a particular length of cabling
from our responsibility to their responsibility. So
let's say our Demark point in this building isn't over on the side. Where are MDF? ISS say for some reason, it actually comes in on the other side of our building.
So the D Mark point is on the other side of our building.
When we may ask the Internet service provider to run a demarche extension
all the way over to our MDF,
and then at our MDF, we would connect in and we would be able to access through the Internet.
So that's our some of our main
point, our main concepts for our network for a network infrastructure RMB F, our main distribution frame, which again is going to be our main network rack our main network closet, our I. D. F's are interviewed intermediate distribution frames,
which is sort of our side branch offices, which provide connective ity to our workstation wall drops
switches there in our offices,
and we have our Demark point, our point of demarcation, where the Internet service provider enters the building, and then our Demark extension extension that the Internet service provider may provide
from our Demark to our MDF. If the D mark point isn't in a convenient location,
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