1 00:00:04,910 --> 00:00:07,550 DNS service, hello, everyone. 2 00:00:07,790 --> 00:00:13,400 Today, we're going to talk about the Genius Service, which is a very important one, and I'm sure 3 00:00:13,400 --> 00:00:18,980 that when they explain it to you, you will understand that you actually see the DNS service in use 4 00:00:18,980 --> 00:00:19,910 every single day. 5 00:00:20,510 --> 00:00:24,610 So you know that every device over the Web has an IP address. 6 00:00:24,620 --> 00:00:26,450 But just think about it. 7 00:00:26,600 --> 00:00:33,950 If we use the IP address as a name of the device, which is usually the case, this name would be really 8 00:00:33,950 --> 00:00:34,470 ugly. 9 00:00:35,480 --> 00:00:42,080 We're not going to be able to remember this name and basically for the users will not be comfortable 10 00:00:42,080 --> 00:00:46,190 because we understand words and letters way better than numbers. 11 00:00:46,430 --> 00:00:53,410 Also, it is way easier to remember a word than random numbers placed together. 12 00:00:54,140 --> 00:00:56,750 And here it comes, the Jeunesse Service. 13 00:00:57,050 --> 00:01:07,850 So the Jeunesse Service is basically used to create a domain name or to screen name that is on the top 14 00:01:07,850 --> 00:01:15,450 of the IP address and basically means that we can refer to the name in order to assess the IP address. 15 00:01:15,650 --> 00:01:23,600 So for that reason, the Jinnah's service is one of the foundations of our network today and it makes 16 00:01:23,600 --> 00:01:31,370 it more available for the normal users that don't need to remember in technical terms or numbers. 17 00:01:31,640 --> 00:01:38,720 So, for example, if we check the IP address of Google dot com, you can see that it's eight point 18 00:01:38,720 --> 00:01:48,920 eight point eight and the non authoritative server of Google is going to be actually 172 to 17 for 206. 19 00:01:49,170 --> 00:01:50,440 But how do we check that? 20 00:01:50,450 --> 00:01:56,740 They were six to one common that you can use in basically every device and this is code in this lookup. 21 00:01:56,990 --> 00:02:02,220 So let's go now to the terminal and let's see how this comment actually works. 22 00:02:02,600 --> 00:02:08,330 So here I am in the terminal from my MacBook in Right Enis Look. 23 00:02:10,250 --> 00:02:15,800 So after was here this morning, as you can see now, we can basically check everything on the Web and 24 00:02:15,800 --> 00:02:20,820 see its IP address, which is quite useful and sometimes quite fun to do. 25 00:02:21,260 --> 00:02:26,210 So just think about some website entries here and you immediately see its IP address. 26 00:02:26,450 --> 00:02:32,390 I would do a website of my desire, for example, related to YouTube dot com. 27 00:02:33,730 --> 00:02:43,490 And if I check here, I can see the exact IP address of YouTube, which is in our case, 170 to 217 28 00:02:43,490 --> 00:02:44,540 470. 29 00:02:44,900 --> 00:02:48,940 Let's try another and let's try, for example, on our famous website. 30 00:02:48,950 --> 00:02:52,130 Let's see, let's see games dot com. 31 00:02:52,580 --> 00:02:59,090 OK, so here you can see that, for example, the games, dot com hiss, quite a lot of IP addresses 32 00:02:59,090 --> 00:03:05,210 associated with actually it has two, six, seven IP addresses associated with games, dot com. 33 00:03:05,720 --> 00:03:08,090 And let's try my website, which is called. 34 00:03:10,540 --> 00:03:19,530 Skilled Army dot com, and you can see that this is actually my IP address, which is a public one, 35 00:03:19,540 --> 00:03:21,220 and you can always check it from the Web. 36 00:03:21,490 --> 00:03:26,590 Let's now try to access an IP address or a website that doesn't exist. 37 00:03:28,780 --> 00:03:30,820 I will just write some random letters. 38 00:03:33,620 --> 00:03:40,940 Dot com, and you can see that service can be found and this is because this website does not exist. 39 00:03:40,970 --> 00:03:47,420 OK, so here we have the server, but the actual credit also the website does not exist because it is 40 00:03:47,420 --> 00:03:48,260 simply not there. 41 00:03:48,500 --> 00:03:50,870 So this is why the database is doing. 42 00:03:50,870 --> 00:03:58,010 For example, if you go to the browser and you write the website there, the VNS pretty much translates 43 00:03:58,010 --> 00:04:00,650 as the name that you wrote into an IP address. 44 00:04:00,840 --> 00:04:06,830 So actually this is the actual numbers of the IP address that is related to this name. 45 00:04:07,820 --> 00:04:16,910 For example, Windows is automatically configured to use the DNS service in order to configure the Internet 46 00:04:16,910 --> 00:04:18,080 service providers. 47 00:04:18,260 --> 00:04:23,930 So the the Dennis providers are actually pretty different. 48 00:04:23,930 --> 00:04:25,910 You can have different DNS providers. 49 00:04:26,150 --> 00:04:31,880 They could be, for example, the open ocean is that Waterer DNS, the Google audience as well. 50 00:04:32,120 --> 00:04:40,130 And for example, if you want to assess the Google DNS, you can exoduses the following link and see 51 00:04:40,130 --> 00:04:41,500 some information about it. 52 00:04:41,690 --> 00:04:42,860 So let's actually do it. 53 00:04:43,040 --> 00:04:47,890 So here for Google and Google and go to the website that they provide you on that slide, which is called 54 00:04:48,200 --> 00:04:52,070 Developers, the dot Google dot com speed, public DNS. 55 00:04:52,310 --> 00:04:57,260 You can actually see the information about the DNS. 56 00:04:57,620 --> 00:05:03,070 You can see an article, what is DNS, whatever the network addresses. 57 00:05:03,080 --> 00:05:09,650 And actually this 888 is exactly the one that we found from the terminal, which is the global server. 58 00:05:09,800 --> 00:05:15,550 And you can actually hear see some codes, information about this. 59 00:05:15,890 --> 00:05:23,900 So I would advise you to see that page and read it, because you can see also guides and support above 60 00:05:23,990 --> 00:05:26,960 the public DNS services provided by Google. 61 00:05:27,050 --> 00:05:28,640 So that's the case. 62 00:05:28,820 --> 00:05:30,900 I think it's enough for today. 63 00:05:31,390 --> 00:05:32,800 Thank you very much for watching. 64 00:05:32,810 --> 00:05:36,740 And I hope you enjoyed the topic related to the DNS.