Hi and welcome to Cyber Eri. My name's Anthony and I'm your local subject matter expert for Network Plus, and today we're going to be talking about different wide area network technologies and properties
now. So far in the modules and the segments that we've covered, we've been mostly talking about using the different devices and using the different cable on connector types in a land scenario. Now, land is our local merit local area network, and it's what we're going to encounter. And it's what we're going to be in. In our small geographical area.
Our land is our office or our home or our
living room. It's a It's a small geographical area typically limited to our home or office, where we have several different devices interconnected to provide a network connectivity. Now we'll talk more about the differences between lands and lands and pans and man's
in a in a module down the road.
But in this module we're going to focus on LAN applications. Now when stands for wide area network and a wham is what's going to allow us to connect multiple lands mocha multiple local area networks over a larger geographical area.
Now this could be everything from one office. One branch office connecting to a headquarters office to two dedicated office is connecting over lines together or us connecting to the Internet. The Internet is our the world's largest wide area network because it's a large, interconnected mesh
of local area networks. Talking to each other and allowing each other to access each other's resource is.
If we didn't have the concept that we know of as the Internet, we could still have lands possible. It would just be different lands connecting over a large, large area. Even before we had the Internet, we still had colleges, and we still had military installations and applications
that did connect over large geographical areas
in what was considered there when they're wide area network. So how do we make these connections, what type of technologies and what type of properties do we use to connect to our lands to connect to the Internet or connect to other local area networks across large geographical areas?
Well, that's what this modules is all about.
So we have our lands are wide area networks and ah, lot of the different technologies that we're going to talk about will be either circuit versus packet switching technologies. Now we sort of jumped right in here. But a circuit versus a packet switching connection
means that were either, eh?
Dedicated on when we need it. Technology or we are a O. R. Where technology will we share Some of our band with with other people now are dedicated whenever we need it. Technology. It's called circuit switching
now a circuit switching a circuit switching connection allows us
instant connection instant connection when we need it, a dedicated connection between us and our in point, and we're the only ones who use that connection.
There's no buffering needed. And when we end and we terminate that connection, then we may not be using that connection anymore. Now, this may be an example of this would be something like a phone line connection. When you pick up your phone and you Ah, and you call and you make a connection to the other end,
you're using that circuit switching technology you're calling directly to the other end.
There's no buffering, so in a circuit switching technology, you're not sharing. You're not sharing bandwidth. You have this debt. You have a dedicated circuit to where you need to go, and so there's no buffering and we connect as needed. And when we hang up, that connection's dropped off. That connection is terminated.
are other type of connection that we may encounter will be our packet switching our packet switching connections. Now packet switching is a shared always on circuit, so even if we're not using that circuit, it's always on this connection. The connections between these different points is always on always available,
but these typically share band with not just with us but with other people.
So they're always on the share bandwidth and they do have buffering, which means if we're all utilizing the same connection, if we're all utilizing the same band with, there may be a situation where our packets reach a certain device, reach a certain point where they have to take turn. They have they have toe, wait in line
while they're waiting to be processed. And this is called buffering that waiting in line that they're doing
to be processed is there buffering.
just keep that in mind as we move through our different technologies as we talk about our different, especially talking about our different our physical cable connections between point A and point B. We divide those up into. We have our circuit, our circuit switching connections
and our packet switching connections circuit being
connect at dedicated connect as needed. No buffering connection and then a packet. Switching is a shared, always on connection. But we do have buffering because we may get to the point where we're sharing Resource is with other people, so we have to wait in line a little bit while arm
command will. Our packet is processed.
with our wide area networks, we have several different transmission Media's now a transmission. Media is what we are actually sending our data over to get from one point to another. It's our It's our boat that we're using to carry our data from one country to another. So
what are the different types of transmission media is that we're gonna talk about?
Well, we can really break these transmission media's down into two major types. We have our cable types and we have our wireless types,
cable types, ob obviously being types of cable that physically connected one point to another and then wireless transmissions being transmissions that are done over airwaves. Wireless isn't just restricted to inside of your house. We use different wireless technologies everywhere.
But for our cable types, we're going to talk about different
wide area networks which connect over phone lines,
cable lines and fiber optic lines.
We're gonna talk about those in more detail, and we're gonna break those down and talk about them specifically and their subtypes
for our wireless. We're gonna talk about radio waves and infrared,
Now, we're going to talk about a lot of tech, different technologies, and we're gonna have a lot of different terms for this module. So it's important to make sure that we sort of logically divide these up so we don't start getting them confused. We don't want to confuse. Ah, why Max with d s. L.
So rather than going through and just listing each of these
in the order that you may see in your in your exam objectives the order that you may see in your 802 objectives were actually going to sort of break these up into different segments so that you can keep in your mind a little bit straighter. Uh, the different technologies and what they go with
rather than just rather than Okay, let's talk about D s l Now let's talk about why, Max. Now let's talk about I s d n
We're going to sort of break those up so they're a little bit easier to logically remember on and then my suggestion, especially if you're being if this is your first introduction to these different technologies, is right amount. Make make a chart for yourself and list lists different bullet points and actually make a chart,
which demands, which shows all of the different types and has all the all of their different descriptions
sort of as your little only one, all in one reference guide so that you can look at that and then study that study that later. But let's go ahead and get started and take a look at some of our wide area networks.