In this video, Mike explores the crazy acronym soup around networking, explaining the differences among terms like LAN, WAN, MAN, PAN, CAN, and HAM. (Just kidding on the last term!) This helps minimize confusion as he dives into later networking videos.
- LAN, WAN, PAN, HAM, I mean the A+ is full of these little acronyms. Now we've covered some of those, but I want to kind of take this episode and get them all wrapped up in one nice pretty bow. So, let's go ahead and get start with a LAN. A LAN is a group of computers that are all hooked together to one switch in such a way that they can easily communicate with each other. A LAN is distinct, because all of the computers within this one LAN are going to share an identical network ID. So in this particular LAN, they're all going to be 192.168.4 dot something. Now, we can have lots of LANs, lots and lots of LANs all over the place. And if we start to interconnect these LANs using routers, we no longer have single LAN. What we now have is a WAN. So a Wide Area Network, that has a bunch of Local Area Networks interconnected with one or more routers, and each one of these LANs has a unique network ID. Now if we spread this Wide Area Network out across an entire town for example, we are going to have a Metropolitan Area Network. And if we connect all of these different towns together with lots more routers, so that it covers the United States, ah forget the United States, let's do all over the world, we now have the Internet! (laughs) So the Internet really is the biggest Wide Area Network we have out there. So let's go ahead and get this all put together. Number one, a Local Area Network, or a LAN, is a group of computers that all share the same network ID. Then they tend to be physically very, very close to each other. A Wide Area Network, or a WAN, is two or more Local Area Networks connected together via one or more routers. A Metropolitan Area Network, or a MAN, is going to be Wide Area Network, but it's limited to just a municipal area. And the last one, just to be a little bit different, is PAN. And remember, PAN is unique only to Bluetooth networks, and it's a direct, point-to-point connection between two Bluetooth-capable devices. Make sure you get your ANs together, because CompTIA just loves to talk about this stuff. (upbeat music)
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