1 00:00:08,370 --> 00:00:12,940 Let us start classes of IP address in this lecture. 2 00:00:13,200 --> 00:00:16,440 We'll discuss the five types of IP address classes. 3 00:00:16,990 --> 00:00:24,510 We'll also see in detail what do these classes mean and how to get the class of an IP address just by 4 00:00:24,510 --> 00:00:31,770 looking the numbers, IP addresses and address, having information about how to reach a specific host, 5 00:00:32,700 --> 00:00:40,520 especially outside the LAN and IP address, the 32 bit unique address, having an address piece of goodies 6 00:00:40,530 --> 00:00:41,160 232. 7 00:00:42,180 --> 00:00:49,230 Generally, there are two locations in which IP addresses written doctor decimal notation and hexadecimal 8 00:00:49,320 --> 00:00:49,950 notation. 9 00:00:51,240 --> 00:00:58,740 Some points that need to be noted about not a decimal notation are that the value of any segment is 10 00:00:58,740 --> 00:01:03,360 between zero to 255, as we have discussed in the previous lecture. 11 00:01:03,930 --> 00:01:08,040 And there are no zeros preceding the value in any segment. 12 00:01:08,670 --> 00:01:13,590 For example, if the number is zero five four, it should be written as Pfeifle. 13 00:01:15,180 --> 00:01:24,300 So why classes of I.P. address are important, the 32 bit IP address is divided into five subclasses. 14 00:01:24,300 --> 00:01:31,290 As you can see on the screen, these are Class E, Class B, Glassey, Class D and Class E. 15 00:01:32,850 --> 00:01:38,370 Each of these classes has a valid ring of IP address classes. 16 00:01:38,370 --> 00:01:44,740 D and E are reserved for multicast and experimental purposes respectively. 17 00:01:45,930 --> 00:01:51,720 The order of the bits in the first octet determines the class of an IP address. 18 00:01:53,250 --> 00:02:00,900 IP address is divided into two parts network ID that is needed and horsetail. 19 00:02:02,690 --> 00:02:11,300 The class of IP address is used to determine the bits used for network idy and horsehide, each Internet 20 00:02:11,300 --> 00:02:18,710 service provider or network administrator assigns IP addresses to each device that is connected to the 21 00:02:18,710 --> 00:02:19,170 Internet. 22 00:02:20,750 --> 00:02:31,400 Note that IP addresses are globally managed by the Internet, assigned numbers authority and A and regional 23 00:02:31,400 --> 00:02:37,220 Internet registries that is are well, finding. 24 00:02:37,220 --> 00:02:45,170 The total number of IP addresses to IP addresses are not counted and are therefore decreased from the 25 00:02:45,170 --> 00:02:56,570 total count because the IP address of any network is the network number, whereas the last IP address 26 00:02:56,930 --> 00:02:58,940 is reserved for broadcast IP. 27 00:02:59,780 --> 00:03:03,170 Let me repeat the sentence once again for you if you want. 28 00:03:03,170 --> 00:03:06,760 You may note down because this is very important. 29 00:03:08,840 --> 00:03:10,100 So here it goes. 30 00:03:11,250 --> 00:03:21,390 While finding the total number of host IP addresses to IP addresses are not counted and are therefore 31 00:03:21,390 --> 00:03:30,780 decreased from the total count because the IP address of any network is the network number, whereas 32 00:03:31,050 --> 00:03:35,400 the last IP address is reserved for broadcast IP. 33 00:03:36,360 --> 00:03:39,780 Now let us move on to the first class, which is class. 34 00:03:43,880 --> 00:03:51,260 IP addresses belonging to Class E are assigned to the networks that contain a large number of hosts, 35 00:03:52,190 --> 00:04:01,070 the network IP is eight bits long, whereas the horsehide is 24 bits long, the higher order with the 36 00:04:01,070 --> 00:04:04,920 first update in class, it is always set to zero. 37 00:04:05,900 --> 00:04:11,540 The remaining seven bits in the first octet are therefore used to determine network ID. 38 00:04:12,590 --> 00:04:20,120 Therefore, the total number of network IDs is to rise to seven, which is equivalent to 128. 39 00:04:21,290 --> 00:04:27,430 The 24 bits of horsehide are used to determine the host in any network. 40 00:04:28,160 --> 00:04:34,570 The default subnet mask for Class E is fifty five point X indexed point X. 41 00:04:35,360 --> 00:04:36,620 Now you may have a question. 42 00:04:36,770 --> 00:04:38,090 What is a subnet mask? 43 00:04:38,540 --> 00:04:43,370 Don't worry, we are going to talk about submitting and submitting mass after this little. 44 00:04:46,120 --> 00:04:55,090 Not that zero point zero point zero point zero and one twenty seven point x y, there are special addresses, 45 00:04:55,090 --> 00:04:57,880 as we have discussed a couple of minutes before. 46 00:05:00,610 --> 00:05:08,950 The next is Glasby IP addresses belonging to Glasby are assigned to the networks that range from medium 47 00:05:08,950 --> 00:05:10,930 sized to large sized networks. 48 00:05:11,890 --> 00:05:17,860 The network, it is 16 minutes long and the horsehide is 16 minutes long. 49 00:05:20,110 --> 00:05:22,390 Other bits of the first opted in. 50 00:05:22,390 --> 00:05:25,850 Glasby is always set to one zero. 51 00:05:26,530 --> 00:05:35,470 Therefore, there are 14 bits remaining which are used to determine the network ie the 16 bits of hostilely 52 00:05:35,800 --> 00:05:39,140 are used to determine the host in any network. 53 00:05:39,940 --> 00:05:46,780 The default subnet mask for Glassie is to fifty five point two fifty five point XPoint x. 54 00:05:47,840 --> 00:05:54,890 Since 14 beds are used to determine the network idee, total number of network IDs is to rise to 14 55 00:05:55,400 --> 00:06:02,090 and total number of hostages is to rise to 16 minus two while minus two. 56 00:06:02,120 --> 00:06:05,650 We have already discussed in the previous slide. 57 00:06:08,820 --> 00:06:16,910 The next one is Class C IP addresses belonging to Class C are assigned to small sized networks. 58 00:06:18,000 --> 00:06:24,840 The network of Glassie is 24 minutes long and the host is eight minutes long. 59 00:06:26,060 --> 00:06:33,530 Therefore, there are available hosts are two, it is two eight minus two, which is 256, minus two, 60 00:06:33,830 --> 00:06:38,390 that is 254 hostiles are available for C. 61 00:06:39,750 --> 00:06:48,360 The higher order bits of the first octet of IP address of Glassey are always said to one one zero. 62 00:06:49,560 --> 00:06:58,650 The remaining 21 beds are used to determine that the eight bits of horsehide is used to determine the 63 00:06:58,650 --> 00:06:59,960 host in any network. 64 00:07:01,340 --> 00:07:08,870 Therefore, the default subnet mask for Glassie is two fifty five point two fifty five point two fifty 65 00:07:08,870 --> 00:07:09,950 five point X. 66 00:07:12,470 --> 00:07:21,410 The fourth glass is glass, the IP addresses belonging to glass be reserved for multicasting the higher 67 00:07:21,410 --> 00:07:29,960 order bits of the first octet of IP address belonging to Gladdie and always set two one one one zero. 68 00:07:31,540 --> 00:07:40,600 The remaining 28 bits are used to determine network idy the 28 bits of horsehide are used to determine 69 00:07:40,600 --> 00:07:42,120 the host in any network. 70 00:07:42,760 --> 00:07:46,780 Therefore, total number of network IDs is to this 228. 71 00:07:49,900 --> 00:07:58,140 Finally moving to the last class that is Class E IP addresses belonging to Class E are reserved for 72 00:07:58,150 --> 00:08:00,670 experimental and research purposes. 73 00:08:01,600 --> 00:08:11,110 IP addresses of Class E range from 240 point of zero point zero point zero to two fifty five point two 74 00:08:11,110 --> 00:08:18,130 fifty five point two fifty five point two fifty for this class doesn't have any subnet mask. 75 00:08:18,790 --> 00:08:27,370 So if anyone asks you which class doesn't have any subnet mask, the obvious answer is class E, the 76 00:08:27,370 --> 00:08:33,730 higher order bits of the first octet of Class E are always set to one one, one one. 77 00:08:34,930 --> 00:08:38,410 So I hope you are clear with all the classes. 78 00:08:38,800 --> 00:08:42,060 If you are not clear, you can always re watch the videos again. 79 00:08:43,690 --> 00:08:48,810 So here's a quick recap, it's a quick table for the class full IP address. 80 00:08:49,420 --> 00:08:57,970 So as you can see for the class e Nasdaq address is zero point zero point zero point zero two one twenty 81 00:08:57,970 --> 00:09:01,360 seven point two fifty five point fifty five point fifty five. 82 00:09:01,870 --> 00:09:04,780 In the same way, you have to remember this table. 83 00:09:04,780 --> 00:09:11,110 And therefore you can see Glasby starts from 128 point zero point zero point zero. 84 00:09:11,650 --> 00:09:14,860 Glassey starts from 192 point zero. 85 00:09:15,130 --> 00:09:18,150 Class D starts from twenty four point zero. 86 00:09:18,850 --> 00:09:21,280 So suppose someone gives you an example. 87 00:09:21,880 --> 00:09:27,580 Let's say I like a random address, one twenty eight point fifty two point fifty six point one twenty 88 00:09:27,580 --> 00:09:27,880 three. 89 00:09:28,330 --> 00:09:32,140 So if anyone asks you to switch class, this address belongs. 90 00:09:33,560 --> 00:09:37,870 You may see the first is the first octet is what we did. 91 00:09:38,200 --> 00:09:47,800 So for sure, this IP address belongs to Class B in this way, just by looking at the numbers, you 92 00:09:47,800 --> 00:09:50,650 can guess the class of IP address.