Time
10 hours 41 minutes
Difficulty
Beginner
CEU/CPE
12

Video Transcription

00:05
So in this module were reviews of the components that make up a network.
00:09
So networks made up of switches and routers and they're connected in various ways. So we have large network, small network. So we need to have we have names to find different kinds of networks
00:19
that exist. So land Network is kind of commonly referred to as a smaller network. That's usually within a single building
00:28
or areas right next to each other stands for local area network
00:33
awareness. When we start leaving the building especially separated geographically,
00:39
so you'd have a land, maybe in each office and then aware is
00:43
connecting those offices.
00:46
So if I have ah, if I have a land, a land would be okay. I have an office in California, have a number of PCs. They're all network together. That'd be a land haven't have an office in Washington. D C. Bunch PC is connected to a lamb, but then
01:00
the two of them talking to each other would be considered a win or a wide area network.
01:07
Those years are gonna be connected by another technology. Besides your same switches,
01:12
they might go over
01:15
dedicated circuits,
01:22
go through a satellite dish if you're
01:23
at a remote location. In some cases
01:30
Metropolitan area network man you don't hear this used as much gets kind of blurry between a win and a land man was kind of
01:38
developed out of the concept of providing
01:42
Internet to an entire city.
01:45
So a man some of these some cities were coming up with projects to implement WiFi across the entire city
01:51
or to a specific geographic area that could be considered a man.
01:57
So it fits directly between
02:00
away and in the land.
02:02
Pan is a new term being used for personal area network. We have all these mobile devices coming out that have wireless connectivity is such a Bluetooth infrared. NFC is near field communications
02:16
that is,
02:17
on a lot of our new mobile devices. They come with an F C and N F C is. Is that entrance MIT to a very short distance or by physical contact? Where we're seeing this now in the mobile device world is for as payment systems.
02:31
So there's an apple in here that let me tie it to my credit card, and then I can go to stores that support it and you you touch your phone to the sensor will pop up on my phone for a pin number and let me pay for stuff that way. That's an example of using
02:46
near field communication where you see some of the other phones now the advertising stuff where you can touch the phones together to send an image to the other one that's using
02:55
near field communication where
02:58
it's a shore initiate session. Usually you'll be prompted to authorize it on the device you're using for That's in there. So
03:05
we've had enough of this kind of stuff, like near Field Communications for file transfers or talking to other devices.
03:13
UH, that we've developed a name for it called Personal Area Network.
03:17
Bluetooth, of course, is mainly used for such things as wireless
03:23
headphones for talking
03:25
or wireless headsets.
03:27
Where was keyboards?
03:30
It's the best way to use some kind of. Instead of using a USB like you would on a typical computer, use Bluetooth toe
03:36
before those kind of function on a mobile device.
03:46
So a network we moved at around
03:49
using what's called frames and through a network interface card or Nick.
03:53
Nick provides the host with the physical electrical and our wireless connectivity. So we have a regular Nick, which takes a plug,
04:00
which takes an actual cable. And then we have wireless,
04:02
which works over the airwaves.
04:06
Every Nick has a unique Mac address. This is pivotal for
04:14
for it to work on the network.
04:15
It's part that translation using AARP at the switch,
04:20
so Mac address uniquely identifies it. So this is how a Mac address works or Max answer. Media access control. Sorry.
04:30
So it's 48 bits.
04:31
That's recommend that's in Hexi decimal format. So here's a little key to the Hexi Decimal format here. So
04:39
the first. So here, in this case, we're saying our Mac addresses
04:43
11111111 etcetera.
04:46
So when you look at a Mac address in software, you can look at the Mac address by looking at the properties of network card
04:54
in
04:55
in Windows.
04:57
You can see what the Mac address is sometimes will be in this format. Sometimes it'll be separated with a dash or adopt between each too
05:05
character. That's a common way to see it makes it a little more readable.
05:10
And so what happens is the first half of it.
05:15
The 1st 6 here we're looking at in this format will be unique to the vendor. So when? Uh so every nick manufacturer has a unique
05:27
first half of Mac address that they assigned toe all there,
05:30
uh, nick or network card that they ship out.
05:35
So they've been assigned that first half. The other half will be unique to that specific
05:41
Nick itself. So you can go look at network traffic and you can see Mac addresses coming from a certain Nick. You go look at that first half and then go look on the Internet to see who makes that neck.
05:55
Or you could do it on your own PC. You could see that by that first half, you see who makes that mix? That's vendor specific, but the other half all you'd be unique. At least two that Nick to help,
06:04
because it has to be unique to function on the network

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