1 00:00:00,240 --> 00:00:09,000 So now probably one of the bigger difficulties that people are usually referencing is what are subnets 2 00:00:09,240 --> 00:00:13,590 so networks can be broken down further into what are known as subnets. 3 00:00:13,830 --> 00:00:19,380 And, you know, as the name implies there, they're just some networks that grouped together specific 4 00:00:19,380 --> 00:00:21,240 devices that can communicate with each other. 5 00:00:21,510 --> 00:00:23,940 You may have seen like an IP address, right? 6 00:00:24,060 --> 00:00:28,050 Like like this right here with like a twenty four after it. 7 00:00:28,410 --> 00:00:32,820 So actually represents an address range for a 24 subnet. 8 00:00:33,150 --> 00:00:36,940 So now let's break this down a little bit, because I'm sure you're probably confused. 9 00:00:37,380 --> 00:00:43,680 So here's a breakdown of subnet and you probably copied this chart down, take a screenshot or write 10 00:00:43,680 --> 00:00:46,620 it down somewhere just so you have it as a reference. 11 00:00:46,630 --> 00:00:51,060 Nobody, almost nobody remembers this typically unless you've been working on this for like 10 years. 12 00:00:51,090 --> 00:00:55,830 So let's go over, like, how the IP addresses form and we'll understand something suddenly a little 13 00:00:55,830 --> 00:00:56,090 more. 14 00:00:56,100 --> 00:01:02,610 So an IP address is made up of four numbers that range from zero to 255. 15 00:01:03,060 --> 00:01:05,600 And these are separated by the dots. 16 00:01:05,610 --> 00:01:08,880 You've seen that and the other examples, or you see it right there, too. 17 00:01:09,030 --> 00:01:11,470 There's dots in between each of the four numbers. 18 00:01:11,610 --> 00:01:17,160 So these numbers are called octets because ultimately made up of eight bits. 19 00:01:18,110 --> 00:01:20,300 And Bitzer, just one zero sum over that. 20 00:01:21,530 --> 00:01:29,150 So all together and address contains you this because we have four octets, which A.K. four numbers, 21 00:01:29,360 --> 00:01:33,300 each one of them Ebbetts eight times forward, that's thirty bits. 22 00:01:33,590 --> 00:01:39,620 Now, when we talk about a 24 network, it simply means that the first twenty four bits or the first 23 00:01:39,620 --> 00:01:42,990 three sets for the first three numbers are set in stone. 24 00:01:43,010 --> 00:01:44,460 Those numbers are not going to change. 25 00:01:44,510 --> 00:01:46,140 This is known as the network address. 26 00:01:46,190 --> 00:01:53,210 So we have a subnet like one nine two one six eight one nine zero twenty four. 27 00:01:53,630 --> 00:02:00,020 The one nine two one six eight one part is going to be the same for every single address on this subnet, 28 00:02:00,410 --> 00:02:05,930 with the only difference being the last octet or the last number, which is the zero that you see right 29 00:02:05,930 --> 00:02:07,700 there before this 24. 30 00:02:08,750 --> 00:02:15,650 So as a result, you know, twenty four subnet, you only had two hundred fifty six addresses, a.k.a. 31 00:02:15,830 --> 00:02:18,050 you can only have 256 Hossaini. 32 00:02:18,560 --> 00:02:22,820 So you can look at the little chart over there on the right and it's going to tell you, you know, 33 00:02:23,080 --> 00:02:27,860 the, the mask, which is what represents, you know, the twenty four. 34 00:02:28,190 --> 00:02:30,320 Twenty five, twenty six. 35 00:02:30,440 --> 00:02:33,620 That's the network mask that represents that. 36 00:02:34,370 --> 00:02:41,390 And it tells you how many subnets there that that specific type of subnet can have and then how many 37 00:02:41,390 --> 00:02:42,770 hosts you can have as well. 38 00:02:43,100 --> 00:02:50,630 We Arakawa's like I say, you know, just keep the chart handy just so that, you know, you can always 39 00:02:50,630 --> 00:02:54,170 represent understand like twenty eight. 40 00:02:54,170 --> 00:02:55,180 Oh what does that mean. 41 00:02:55,340 --> 00:02:57,830 And you have this chart, you understand exactly what that means. 42 00:02:57,830 --> 00:02:58,040 A good.