All language subtitles for 1. What is DNS

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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:05,980 --> 00:00:07,180 What is DNS? 2 00:00:09,060 --> 00:00:14,250 Due to the proliferation of the internet, browsing to websites from our computers, phones or tablets 3 00:00:14,610 --> 00:00:16,650 is now an integral part of our daily lives. 4 00:00:16,950 --> 00:00:22,440 And all it involves is typing the right benign name into our browser for easy shopping. 5 00:00:22,860 --> 00:00:31,800 We browse to sites like W-, W- W-, Amazon.com or WW Dot eBay.com for online banking. 6 00:00:32,160 --> 00:00:39,090 We navigate the websites such as W, WW Dot, Bank of America Dot Com, and to watch some of the latest 7 00:00:39,090 --> 00:00:43,200 movies we visit the likes of WW W Dot Netflix dot com. 8 00:00:44,110 --> 00:00:49,120 The entire experience of surfing the Web basically involves browsing two domain names, such as the 9 00:00:49,120 --> 00:00:52,450 ones mentioned as they are easy for us humans to remember. 10 00:00:55,180 --> 00:01:01,480 The problem is, however, that unlike humans, computers work with numbers since each device connected 11 00:01:01,480 --> 00:01:06,130 to the internet has a unique IP address, which other machines use to find it. 12 00:01:06,580 --> 00:01:11,860 What this means is that though we can browse the website by typing its IP address in our browser, we 13 00:01:11,860 --> 00:01:19,000 cannot do the same with domain names unless we use a specific supporting mechanism designed to translate 14 00:01:19,000 --> 00:01:20,710 domain names to IP addresses. 15 00:01:21,880 --> 00:01:23,410 And this is where DNS comes in. 16 00:01:24,160 --> 00:01:29,980 DNS stands for domain name system, and it is the underlying protocol that acts as the intermediary, 17 00:01:30,340 --> 00:01:37,150 allowing for the translation of domain names such as WW W Dot, BBC Decoder UK to the IP address or 18 00:01:37,150 --> 00:01:43,510 addresses that belong to the computer system hosting the actual contents that we as the end users want 19 00:01:43,510 --> 00:01:44,160 to access. 20 00:01:45,780 --> 00:01:51,900 This is why dance is often referred to as the phone book of the internet, in that it works in a very 21 00:01:51,900 --> 00:01:58,170 similar way to a conventional phone book where we perform a lookup against the name with a goal to get 22 00:01:58,170 --> 00:02:00,210 its associated numeric address. 23 00:02:00,600 --> 00:02:05,940 In other words, VNS makes the link between the action of typing a domain name into a browser and reaching 24 00:02:05,940 --> 00:02:11,310 the computer system, which hosts the desired content without DNS. 25 00:02:11,610 --> 00:02:18,730 We would need to know the IP address of the site we wish to browse to, such as 0:55, though 23 eight 26 00:02:18,750 --> 00:02:19,140 nine. 27 00:02:19,320 --> 00:02:26,100 If it's an IP before address or more complex alphanumeric IP addresses such as two four zero zero column 28 00:02:26,280 --> 00:02:36,810 C. B. zero zero column two zero four eight column one column column C six to nine column D7 A2 if it's 29 00:02:36,810 --> 00:02:37,770 an IP address. 30 00:02:38,370 --> 00:02:42,510 Needless to say, this is not practical at all, even for technical individuals. 31 00:02:42,750 --> 00:02:49,290 And so DNS has been created with the aim of eliminating the need for humans to memorize IP addresses 32 00:02:49,290 --> 00:02:52,830 and instead use human friendly domain names while browsing. 33 00:02:54,320 --> 00:03:00,590 In summary, without DNS, we will not be able to use the internet as we do today without being said, 34 00:03:00,920 --> 00:03:07,400 DNS is a lot more complicated than a phone book, and its versatility has gone beyond the task of translating 35 00:03:07,400 --> 00:03:08,900 domain names to IP addresses. 36 00:03:09,290 --> 00:03:14,000 The protocol steps and sophistication would become more apparent as we progressed through the course. 37 00:03:14,970 --> 00:03:19,410 I would love to take a moment to thank you again for running this course designed to teach you everything 38 00:03:19,410 --> 00:03:24,240 you need to know about one of the most important internet protocols out there, taking you from the 39 00:03:24,240 --> 00:03:25,770 status of newbie to expert. 40 00:03:25,800 --> 00:03:26,520 Along the way. 4481

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