1 1 00:00:00,160 --> 00:00:03,080 In the last video, we talked about network geography. 2 2 00:00:03,080 --> 00:00:06,060 And so you may be wondering why am I sitting in my car? 3 3 00:00:06,060 --> 00:00:09,040 Well, the reason I am is because my car has an example 4 4 00:00:09,040 --> 00:00:11,860 of three of those network geographies all located 5 5 00:00:11,860 --> 00:00:13,320 in one vehicle. 6 6 00:00:13,320 --> 00:00:16,770 So let's talk about the PAN, the LAN, and the WAN a bit. 7 7 00:00:16,770 --> 00:00:18,290 First, we have the PAN, 8 8 00:00:18,290 --> 00:00:19,760 and this is going to be the connection 9 9 00:00:19,760 --> 00:00:23,120 between my Bluetooth cell phone and my car stereo. 10 10 00:00:23,120 --> 00:00:25,280 This is going to go just a couple of feet, 11 11 00:00:25,280 --> 00:00:27,510 basically within the area around my person 12 12 00:00:27,510 --> 00:00:28,800 or within the vehicle, 13 13 00:00:28,800 --> 00:00:30,960 and that might be something like five feet 14 14 00:00:30,960 --> 00:00:33,170 or 10-feet worth of distance. 15 15 00:00:33,170 --> 00:00:34,870 Next, we have the LAN. 16 16 00:00:34,870 --> 00:00:37,800 My car actually has the ability to connect over Wi-Fi. 17 17 00:00:37,800 --> 00:00:39,510 So when I pull the car into the garage, 18 18 00:00:39,510 --> 00:00:42,110 it connects back to my home network over Wi-Fi, 19 19 00:00:42,110 --> 00:00:44,090 and that way it can get software updates 20 20 00:00:44,090 --> 00:00:47,033 or anything else it needs over that local area network. 21 21 00:00:47,920 --> 00:00:50,870 Lastly, I have a WAN connection in this car. 22 22 00:00:50,870 --> 00:00:52,510 When I'm out and about in town, 23 23 00:00:52,510 --> 00:00:54,720 I actually am able to connect through a cellular modem 24 24 00:00:54,720 --> 00:00:57,350 that's built into the car out to the internet. 25 25 00:00:57,350 --> 00:00:59,630 This way I can get traffic updates, 26 26 00:00:59,630 --> 00:01:02,710 I can get streaming media like radio and music, 27 27 00:01:02,710 --> 00:01:05,510 and other things while I'm out and on the go. 28 28 00:01:05,510 --> 00:01:09,180 This car ends up having a PAN, a LAN and a WAN, 29 29 00:01:09,180 --> 00:01:11,940 and you can see how these areas of network geography 30 30 00:01:11,940 --> 00:01:14,290 are all focused on how big something is 31 31 00:01:14,290 --> 00:01:15,440 or how little it is 32 32 00:01:15,440 --> 00:01:17,810 with the PAN being the distance within the car, 33 33 00:01:17,810 --> 00:01:20,420 the LAN being the distance between the car and the house, 34 34 00:01:20,420 --> 00:01:21,790 and then the WAN, 35 35 00:01:21,790 --> 00:01:23,110 which is the distance from the car 36 36 00:01:23,110 --> 00:01:24,993 all the way out across the world.