1 00:00:01,140 --> 00:00:07,440 OK, in the last lecture, we have an introduction to the DCP server, and as I said, I'm going to 2 00:00:07,440 --> 00:00:10,890 talk about the DCP server operations in this lecture. 3 00:00:11,790 --> 00:00:13,470 So now let us see. 4 00:00:13,740 --> 00:00:16,430 This PC is your PC. 5 00:00:16,440 --> 00:00:17,400 Let me use the pen. 6 00:00:17,410 --> 00:00:22,250 Yes, this is your PC and this is the DHP. 7 00:00:22,260 --> 00:00:25,620 So, OK, so now what happens now? 8 00:00:25,620 --> 00:00:35,100 The first step is the DSP client broadcast the DSP Discover message, which means that the client or 9 00:00:35,100 --> 00:00:40,560 the host in this case, which is your machine, will ask the DSP for an IP address. 10 00:00:41,040 --> 00:00:46,020 Now, I want to tell you one thing that you you will have a question in your mind that why would my 11 00:00:46,020 --> 00:00:47,400 PC need an IP address? 12 00:00:47,550 --> 00:00:49,110 I already have an IP address. 13 00:00:49,620 --> 00:00:54,320 Well, when you log into the Internet, your IP address keeps on changing, right? 14 00:00:54,330 --> 00:00:59,570 You do not have the one static IP address when you are connected to the Internet. 15 00:01:00,120 --> 00:01:05,910 Your PC has a separate IP address and a separate MAC address, which is Hardcoded Mac address. 16 00:01:05,910 --> 00:01:09,340 And the market doesn't change, but your IP can change. 17 00:01:10,020 --> 00:01:16,870 So when you connect to a VPN at that time, what your host does is your host as the Via VPN Liedtke 18 00:01:16,890 --> 00:01:19,920 server to give you an IP address. 19 00:01:20,760 --> 00:01:29,310 Now the next step is the DSP server request replies with the DCP offer a message saying that, hey, 20 00:01:29,340 --> 00:01:33,020 this is the IP address or the pool of IP address, which I'm giving you. 21 00:01:33,360 --> 00:01:35,540 So if you're okay with it, just let me know. 22 00:01:35,550 --> 00:01:36,750 This is the IP address. 23 00:01:37,860 --> 00:01:43,680 Now your host will see the ACP client responds with DXP request message. 24 00:01:43,680 --> 00:01:49,410 It says, OK, I would like to have this IP address, so please give me this IP address. 25 00:01:50,790 --> 00:01:59,120 And finally, the DHP sort, complete with DHP acknowledgement message, and after this step is done, 26 00:01:59,370 --> 00:02:07,110 your PC will finally get the IP address and in this way, DHP server actually works. 27 00:02:07,680 --> 00:02:15,780 Now, if you need to provide an address from a DCP server to hosts that are under the same local area 28 00:02:15,780 --> 00:02:20,520 network, you can configure your router to relay or forwarder. 29 00:02:20,520 --> 00:02:22,180 DHC declined requests. 30 00:02:23,130 --> 00:02:23,700 Don't worry. 31 00:02:23,700 --> 00:02:25,740 Let me explain you in simple words. 32 00:02:26,370 --> 00:02:29,700 For example, let's say you have two networks, OK? 33 00:02:29,700 --> 00:02:30,780 You have two networks. 34 00:02:30,780 --> 00:02:38,490 Consider this as the E network and consider this as a network and consider this as the IT talk so that 35 00:02:38,610 --> 00:02:42,660 it works and your host is here and your DCB client is here. 36 00:02:43,170 --> 00:02:47,940 This episode is here and now you need to provide addresses. 37 00:02:47,940 --> 00:02:52,970 But but this DXP server has already been full of the addresses. 38 00:02:52,980 --> 00:02:55,190 It doesn't have any more addresses. 39 00:02:55,200 --> 00:03:02,730 So what you do is you take you want aggressor's from this DCPI circuit, but this isn't another network 40 00:03:02,730 --> 00:03:03,810 and you are here. 41 00:03:04,440 --> 00:03:07,140 So what would you do now? 42 00:03:07,140 --> 00:03:15,750 You first will contact this DCB server for full of addresses, but this DHP Soroses that, hey, I don't 43 00:03:15,750 --> 00:03:18,640 have any more addresses as the addresses are full. 44 00:03:19,020 --> 00:03:27,060 So what is DCP really is actually this server transfers, the requests are basically forward, the request 45 00:03:27,300 --> 00:03:34,830 to this server here and therefore in this way this DCB server can respond back to this server and then 46 00:03:34,830 --> 00:03:38,880 this server can respond back to you to get your IP address. 47 00:03:39,300 --> 00:03:46,740 This entire process is called as DH Sepi really or DCP Forward. 48 00:03:47,550 --> 00:03:49,910 OK, congratulations. 49 00:03:50,190 --> 00:03:57,630 I'm really proud that you have made this lecture and it takes real enthusiasm and real motivation to 50 00:03:57,630 --> 00:03:58,820 do now. 51 00:03:59,160 --> 00:04:05,220 Now we have completed the major networking devices that will be required in your coursework or during 52 00:04:05,220 --> 00:04:06,450 your interview preparations. 53 00:04:06,930 --> 00:04:11,760 In the next lecture, we will have an introduction to other network devices, which also exists. 54 00:04:11,760 --> 00:04:17,790 And I'm pretty sure that no other course on the Internet or on any other platform will teach you these 55 00:04:17,790 --> 00:04:18,740 other devices. 56 00:04:19,140 --> 00:04:25,230 So it's my humble request that if you are really enjoying this course, I would just expect a reading 57 00:04:25,230 --> 00:04:26,000 from your site. 58 00:04:26,010 --> 00:04:29,070 It almost takes only 30 seconds to give a rating. 59 00:04:29,430 --> 00:04:31,860 That's all instructors can expect from you. 60 00:04:32,280 --> 00:04:37,760 And if you motivate us, your feedback really motivate us to do more courses. 61 00:04:38,160 --> 00:04:43,890 So in the next lecture, we are going to start or have an introduction to the other network devices 62 00:04:43,890 --> 00:04:47,340 that are really very important from networking point of view.