1 00:00:00,178 --> 00:00:04,917 In the previous video, we already calculate Total IP and Subnetmask. 2 00:00:05,340 --> 00:00:10,755 Now in this video, we are going to calculate Network IP and Broadcast IP. 3 00:00:11,283 --> 00:00:13,354 Okay let’s just start. 4 00:00:13,935 --> 00:00:18,000 Remember that the Network IP is the first IP in the network. 5 00:00:18,448 --> 00:00:23,546 So the Network IP is must be 0. Do you remember why? 6 00:00:23,876 --> 00:00:29,684 Because the number in the IP Address is always between 0 until 255. 7 00:00:30,119 --> 00:00:36,106 So that is why the first IP or Network IP will always be 0. 8 00:00:37,030 --> 00:00:40,983 Okay now we have network IP in the first block subnet. 9 00:00:41,247 --> 00:00:46,835 If you remember in the previous video, I already show you about block subnet. 10 00:00:47,020 --> 00:00:51,657 And here, 0 is the network IP in the first block subnet. 11 00:00:52,317 --> 00:00:56,339 Now let’s calculate the network in the next block subnet. 12 00:00:56,827 --> 00:01:03,511 The network in the second block subnet will be 0 plus by total IP, which is 16. 13 00:01:03,828 --> 00:01:05,945 The result is 16. 14 00:01:06,591 --> 00:01:13,949 For the third block subnet, the network is 16 plus by total IP again, which is 16. 15 00:01:14,160 --> 00:01:16,792 So the result is 32. 16 00:01:17,347 --> 00:01:25,638 Fourth block subnet, the network is 32 plus by total IP again, so the result is 48. 17 00:01:26,166 --> 00:01:33,805 Fifth block subnet, the network is 48 plus by total IP again, the result is 64. 18 00:01:33,963 --> 00:01:41,399 Sixth block subnet, the network is 64 plus by total IP again, the result is 80. 19 00:01:41,927 --> 00:01:46,076 We can doing this until we found 256. 20 00:01:46,327 --> 00:01:49,952 If we reach 256, we can stop there. 21 00:01:50,177 --> 00:01:56,935 Because remember that the number in IP Address is only between 0 until 255. 22 00:01:57,357 --> 00:02:01,312 So if we reach 256, we can stop. 23 00:02:01,867 --> 00:02:06,474 But actually we don’t need to calculate until reach 256. 24 00:02:07,108 --> 00:02:11,567 Sometimes we just need to calculate until we find some block subnet. 25 00:02:11,739 --> 00:02:15,446 In this case we are enough to have six block subnet. 26 00:02:16,236 --> 00:02:20,169 Okay, now we have Network IP until sixth block subnet. 27 00:02:20,618 --> 00:02:23,660 Next, let’s calculate the Broadcast IP. 28 00:02:24,149 --> 00:02:31,441 The Broadcast IP in the first block subnet is 16 minus by 1, the result is 15. 29 00:02:32,087 --> 00:02:37,097 For second block subnet, 32 minus by 1, which is 31. 30 00:02:37,837 --> 00:02:43,270 Third block subnet, 48 minus by 1, which is 47. 31 00:02:43,838 --> 00:02:49,632 Fourth block subnet, 64 minus by 1, which is 63. 32 00:02:50,120 --> 00:02:55,787 Fifth block subnet, 80 minus by 1, which is 79. 33 00:02:55,945 --> 00:03:01,812 Okay, now we have Network IP and Broadcast IP until fifth block subnet. 34 00:03:02,234 --> 00:03:12,946 First block subnet is 0 until 15, second block subnet is 16-31, third block subnet is 32 35 00:03:12,946 --> 00:03:24,784 until 47, fourth block subnet is 48 until 63, and last fifth block subnet is 64 until 79. 36 00:03:25,536 --> 00:03:30,000 Next, we need to determine, which block subnet we will use. 37 00:03:30,370 --> 00:03:33,697 In this case, I will use the seconds block subnet. 38 00:03:34,027 --> 00:03:39,778 So the network IP is 16, and the Broadcast IP is 31. 39 00:03:40,279 --> 00:03:52,626 Let’s write it, the network IP is 172.16.10.16, this 16 is the result of our calculation before 40 00:03:53,009 --> 00:04:04,624 and the broadcast IP is 172.16.10.31, this 31 is the result of our calculation before. 41 00:04:05,680 --> 00:04:11,803 Okay now we have done calculating the Network IP and the broadcast IP, and also we already 42 00:04:11,803 --> 00:04:15,246 determine that we will use the seconds block subnet. 43 00:04:15,695 --> 00:04:18,894 Last, we need to calculate Range IP. 44 00:04:19,501 --> 00:04:24,528 Remember that Network IP and Broadcast IP will never can be used. 45 00:04:24,739 --> 00:04:27,290 Let’s try it in cisco packet tracer. 46 00:04:27,594 --> 00:04:38,521 We are going to use the network IP 172.16.10.16 with subnetmask 255.255.255.240, 47 00:04:39,101 --> 00:04:42,139 and we will see that we will get an error. 48 00:04:43,221 --> 00:04:56,515 Go to PC and set the IP to 172.16.10.16 and the subnetmask is 255.255.255.240, 49 00:05:00,264 --> 00:05:03,206 Okay here we can see that we get an error. 50 00:05:03,549 --> 00:05:06,860 It will also the same if we use broadcast IP. 51 00:05:07,058 --> 00:05:09,000 We will also get an error. 52 00:05:09,259 --> 00:05:20,645 Let’s try it, 172.16.10.31 and the subnetmask is 255.255.255.240. 53 00:05:21,476 --> 00:05:24,898 Okay here, we can see that we also get an error. 54 00:05:25,412 --> 00:05:30,777 So the conclusion is that Network IP and Broadcast IP will never can be used. 55 00:05:31,041 --> 00:05:34,514 And the IP that we can use is the Range IP. 56 00:05:35,161 --> 00:05:38,009 Okay, now let’s calculate the Range IP. 57 00:05:38,220 --> 00:05:47,579 Here we can see that the network is 16, so the range IP is start from 17 until before 31 58 00:05:47,579 --> 00:05:49,307 which is 30. 59 00:05:49,637 --> 00:06:00,926 So the Range IP is 172.16.10.17 until 172.16.10.30. 60 00:06:01,520 --> 00:06:05,128 We can use these IP for our 12 PC. 61 00:06:05,867 --> 00:06:10,437 Now let’s try to configure the IP address again in the cisco packet tracer. 62 00:06:10,688 --> 00:06:16,541 But now, we are going to use the right IP, so we won’t get errors. 63 00:06:16,686 --> 00:06:27,253 Let’s say we use 172.16.10.17 and the subnetmask is 255.255.255.240. 64 00:06:27,728 --> 00:06:30,958 Okay here we can see that we don’t get an errors. 65 00:06:31,829 --> 00:06:36,950 Okay I think enough for this video, in the next video, we are going to learn subnetting 66 00:06:36,950 --> 00:06:39,244 again with another case. 67 00:06:39,758 --> 00:06:43,342 Thankyou for watching and see you on the next video!