1 00:00:00,380 --> 00:00:06,630 Now if you're connecting one device to another you once again need some kind of media that allows for a 2 00:00:06,630 --> 00:00:09,720 data transmission from one device to another. 3 00:00:09,720 --> 00:00:16,420 In other words you need some type of data link to allow data to be transferred from one device to another. 4 00:00:16,440 --> 00:00:18,760 I've already shown you Ethernet. 5 00:00:18,900 --> 00:00:24,080 This is a very common type of Ethernet this is Cat5e or Category 5. 6 00:00:24,570 --> 00:00:28,230 We'll talk more about Ethernet later but Cat5e, 7 00:00:28,260 --> 00:00:35,460 This is an example of Cat 6 Ethernet cabling. unshielded twisted pair Ethernet cabling like this, probably 8 00:00:35,460 --> 00:00:40,340 the most common type of cabling that you're going to encounter but it didn't stop there. 9 00:00:44,730 --> 00:00:47,910 Now Ethernet didn't start with unshielded twisted cabling, 10 00:00:47,910 --> 00:00:55,420 it started with 10base5 cabling very big cabling it's not easy to use. 11 00:00:55,470 --> 00:01:02,580 It actually has these black markings on the cable and that's where you would use a wire tap or vampire 12 00:01:02,580 --> 00:01:05,480 tap if you prefer to connect to the network. 13 00:01:05,489 --> 00:01:12,570 You couldn't just connect anywhere you had to connect on these black markings if you wanted a good signal. 14 00:01:12,750 --> 00:01:15,810 And this is how that would look. 15 00:01:15,810 --> 00:01:20,070 Notice this crazy large transceiver. 16 00:01:20,190 --> 00:01:22,430 This is how you would connect to the network. 17 00:01:23,130 --> 00:01:26,480 So to give you an idea of scale. 18 00:01:26,850 --> 00:01:32,040 here I’ve got $1, US bank note, so $1 19 00:01:32,060 --> 00:01:37,240 here's a British pound so notice how big that is. 20 00:01:37,260 --> 00:01:38,730 This is massive cabling. 21 00:01:38,730 --> 00:01:40,740 Really really old technology. 22 00:01:40,920 --> 00:01:47,040 And it gets worse to actually connect your PC to the network. 23 00:01:47,070 --> 00:01:56,280 You needed a drop cable like this, so you would have to connect that to the transceiver. 24 00:01:56,280 --> 00:01:57,900 And as you can see it came up there. 25 00:01:57,900 --> 00:02:01,500 This is very thick cabling not very easy to use 26 00:02:04,710 --> 00:02:10,310 and that would connect to your network card. So you would have this kind of setup. 27 00:02:10,310 --> 00:02:12,710 That's how you would get on to the network. 28 00:02:12,710 --> 00:02:13,850 It's an absolute nightmare. 29 00:02:13,850 --> 00:02:16,770 This cabling very hard to work with. 30 00:02:16,790 --> 00:02:18,850 It was very temperamental. 31 00:02:18,890 --> 00:02:24,190 This is using what's called a bus network in a bus network. 32 00:02:24,190 --> 00:02:30,050 All the devices are connected on one long cable like this nightmare. 33 00:02:30,070 --> 00:02:36,040 I'll demonstrate this in a separate video where I'll build a 10base5 network and show you one that's 34 00:02:36,040 --> 00:02:36,940 working. 35 00:02:36,940 --> 00:02:43,910 But for the moment just notice how ridiculously difficult this cable is to work with how thick it is. 36 00:02:43,960 --> 00:02:47,540 This is called thicknet for a good reason because it's so thick. 37 00:02:48,190 --> 00:02:54,340 So after we had thicknet they then fortunately developed thinnet, or 10base2, 38 00:02:54,370 --> 00:02:59,830 and if you ever wondered why it's called thinnet vs. thicknet just notice the difference in the 39 00:02:59,830 --> 00:03:01,880 size of these cables. 40 00:03:01,930 --> 00:03:04,380 this is thinnet vs. thicknet, 41 00:03:04,450 --> 00:03:14,020 This cabling is much much thinner than this cabling but also used a bus topology also had various issues. 42 00:03:14,090 --> 00:03:19,330 Today we tend to use UTP, Unshielded Twisted Pair cabling like this 43 00:03:19,340 --> 00:03:20,510 that's very common. 44 00:03:20,630 --> 00:03:23,810 Or we use fiber cables and they're different types of fiber cables. 45 00:03:23,810 --> 00:03:26,360 I'll talk more about fiber cables later. 46 00:03:26,360 --> 00:03:29,090 We have multi-mode fiber and single mode fiber. 47 00:03:29,660 --> 00:03:37,830 But the idea is is that I have a Network Interface Card like this or more modern example like this. 48 00:03:37,940 --> 00:03:39,990 This gets inserted into a computer. 49 00:03:40,070 --> 00:03:46,460 And this is how I gain access to the network. A Network Interface Card has a Mac address or Media Access 50 00:03:46,460 --> 00:03:53,060 Control address that is essentially a built-in address built-in by the manufacturer that identifies 51 00:03:53,120 --> 00:03:57,540 this Network Interface Card on the Ethernet network. 52 00:03:57,740 --> 00:04:03,290 If you don't have a Network Interface Card in your laptop you could use USB to Ethernet adapter like 53 00:04:03,290 --> 00:04:04,100 this. 54 00:04:04,130 --> 00:04:10,210 So that would allow you to connect to the network using Ethernet or once again using wireless. 55 00:04:10,260 --> 00:04:13,370 Here's an example of a wireless Network Interface Card . 56 00:04:14,030 --> 00:04:20,930 You essentially need a way to get a node onto the network and a Network Interface Card is the way 57 00:04:21,230 --> 00:04:25,340 that you connect yourself to the Ethernet network. 58 00:04:25,500 --> 00:04:30,910 A lot of devices like iPhones as an example have built-in Network Interface Cards. 59 00:04:30,990 --> 00:04:36,600 They connect directly onto the wireless and they have something like this built inside of them that allows 60 00:04:36,600 --> 00:04:39,150 them to connect to the wireless network. 61 00:04:39,150 --> 00:04:46,020 Remember we are transmitting data from one device to another using some kind of media which could be 62 00:04:46,020 --> 00:04:48,090 the air could be physical cabling.