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In the last video, we talked about network geography,

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and so you may be wondering, why am I sitting in my car?

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Well, the reason I am is

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because my car has an example of three

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of those network geographies all located in one vehicle.

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So let's talk about the PAN, the LAN, and the WAN a bit.

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First we have the PAN,

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and this is going to be the connection

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between my Bluetooth cell phone and my car stereo.

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This is going to go just a couple of feet,

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basically within the area around my person

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or within the vehicle, and that might be

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something like five feet or 10 feet worth of distance.

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Next we have the LAN.

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My car actually has the ability to connect over Wi-Fi,

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so when I pull the car into the garage, it connects back

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to my home network over Wi-Fi,

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and that way it can get software updates

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or anything else it needs over that local area network.

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Lastly, I have a WAN connection in this car.

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When I'm out and about in town, I actually am able

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to connect through a cellular modem

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that's built into the car out to the internet.

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This way I can get traffic updates,

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I can get streaming media like radio and music

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and other things while I'm out and on the go.

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This car ends up having a PAN, a LAN, and a WAN.

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And you can see how these areas of network,

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geography are all focused on how big something is

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or how little it is,

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with the PAN being the distance within the car,

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the LAN being the distance between the car and the house,

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and then the WAN, which is the distance from the car

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all the way out across the world.