1 00:00:01,770 --> 00:00:12,150 And hello again, last time we stopped here on this page that we have the comments to know in our our 2 00:00:12,150 --> 00:00:13,530 DNA, in our computer. 3 00:00:14,530 --> 00:00:24,160 I mean, let's let's give an example, let's put this this graph or matter of fact, this put this government 4 00:00:24,160 --> 00:00:28,260 and we are going to open our and. 5 00:00:30,130 --> 00:00:39,100 Our command prompt and also you should know something about Windows and Linux capital letters should 6 00:00:39,130 --> 00:00:47,500 always take capital and lowercase letters always say that the work is like we have this on Windows and 7 00:00:47,860 --> 00:00:51,490 Linux, but on Cisco packages, it doesn't matter. 8 00:00:51,670 --> 00:00:53,860 It's like capital or not. 9 00:00:54,400 --> 00:00:56,170 So let's do this. 10 00:00:56,170 --> 00:00:58,150 Come on and look up. 11 00:01:00,530 --> 00:01:07,130 And here we have our default server, which is the NSA, that Google and its address is the public address 12 00:01:07,130 --> 00:01:09,760 of Google, which is 8.8.8.8. 13 00:01:10,970 --> 00:01:14,520 Now let's see what we have there. 14 00:01:15,140 --> 00:01:16,610 Here we have the server. 15 00:01:18,250 --> 00:01:26,020 The this is the description of the server that it was a logical system to create a database to ensure 16 00:01:26,050 --> 00:01:26,870 name resolution. 17 00:01:26,890 --> 00:01:27,580 This is right. 18 00:01:29,540 --> 00:01:39,050 At the top of the hour, she wrote, service servers give records about how to reach top level domain 19 00:01:39,050 --> 00:01:47,930 servers, which which in turn have record pointing to second level domain servers and so on. 20 00:01:49,190 --> 00:01:53,330 We have in this in this place, which is a. 21 00:01:54,720 --> 00:02:04,020 Mainly mainly, you don't study it on networking, but you study it on the networking at Linux or networking 22 00:02:04,020 --> 00:02:06,840 at Windows because there is there is a difference. 23 00:02:07,290 --> 00:02:14,960 And second level domain servers, we call them slaves and the first domains are we would call them masters. 24 00:02:14,970 --> 00:02:20,310 We have a an air show in the inner service that is called master slave. 25 00:02:20,640 --> 00:02:21,740 We are going to see it. 26 00:02:21,750 --> 00:02:26,190 We are going to see, but it is not going to be in this course. 27 00:02:27,960 --> 00:02:30,510 And then they see the different top level domains. 28 00:02:30,780 --> 00:02:39,750 These are the following types like generic sites like dot com that or dot net and foreign nationals 29 00:02:39,750 --> 00:02:46,920 like that that's par for France, that the UK, for the United Kingdom, that us, for the United States, 30 00:02:46,920 --> 00:02:48,390 that is for Morocco. 31 00:02:50,010 --> 00:02:53,820 And then we have the SDP server and protocol. 32 00:02:53,820 --> 00:02:57,780 The server is simply for the web is we. 33 00:02:58,080 --> 00:03:01,830 We have like every website, we have this HDP. 34 00:03:03,210 --> 00:03:04,050 Double dots. 35 00:03:04,980 --> 00:03:05,880 Slash slash. 36 00:03:06,120 --> 00:03:13,170 Then we have the WW W Dot, the name of of the website, then that compass the World Wide Web. 37 00:03:13,440 --> 00:03:16,680 This w w w stands for World Wide Web. 38 00:03:16,980 --> 00:03:22,400 Anyway, is DTP is for is for it. 39 00:03:22,410 --> 00:03:31,500 So as as an example, the browsers start interrupting this three parts of the URL sgp, which is the 40 00:03:31,500 --> 00:03:32,790 protocol or the Typekit. 41 00:03:32,910 --> 00:03:35,970 Sometime we'll have the Prius, which is another protocol. 42 00:03:35,970 --> 00:03:37,200 Just it is more secure. 43 00:03:37,500 --> 00:03:39,690 There is the S10 for security. 44 00:03:43,350 --> 00:03:50,370 Like here we have the example of the school. 45 00:03:55,320 --> 00:04:04,020 Now we have the Bob, and it seems to be the Pope and MGP are similar to the FTB, but the F2P is four 46 00:04:04,020 --> 00:04:09,750 five and MGP is four mrJ or males, females and pope. 47 00:04:09,750 --> 00:04:18,200 I think it's MGP said that for a simple mail transfer protocol and bob, it is for the. 48 00:04:20,210 --> 00:04:22,520 Around the office. 49 00:04:22,760 --> 00:04:25,670 Yes, it is for the post office protocol, I think. 50 00:04:26,480 --> 00:04:27,560 And here. 51 00:04:28,700 --> 00:04:36,800 As we can see, they say that MGB is used for a fair, transparent in emails and Bob is for transit, 52 00:04:37,190 --> 00:04:40,630 for transfer, transfer and that's. 53 00:04:44,350 --> 00:04:46,360 Application layers protocol. 54 00:04:48,730 --> 00:04:51,220 Oh, here we have the description. 55 00:04:51,550 --> 00:04:57,640 They say images requires multiple applications and services, both of his protocol, as I said, which 56 00:04:57,640 --> 00:05:02,530 is pop and simple measures of protocol as MTV are two applications layer protocol. 57 00:05:03,100 --> 00:05:06,820 We saw that in our first video of layers. 58 00:05:08,700 --> 00:05:16,530 The protocol has specific purposes to allow the user to pick up his email or his made from the horse 59 00:05:16,530 --> 00:05:19,680 that does not contain his movements. 60 00:05:20,910 --> 00:05:30,960 So the difference between as A.B. and Bob is MGB should be in the in the network and Bob, it's going 61 00:05:30,960 --> 00:05:34,200 to be outside of the network and you can still use it. 62 00:05:35,610 --> 00:05:36,090 Thank you.