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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:00,080 --> 00:00:03,540 There are lots and lots of network protocols used, 2 00:00:03,540 --> 00:00:05,190 and they're all necessary to help us 3 00:00:05,190 --> 00:00:07,215 get our packets in the right place. 4 00:00:07,215 --> 00:00:09,810 Think of network protocols like a set of 5 00:00:09,810 --> 00:00:12,510 rules for how we transfer data in a network. 6 00:00:12,510 --> 00:00:15,015 Imagine if you sent a letter to your friend Sasha, 7 00:00:15,015 --> 00:00:16,395 who lives in California, 8 00:00:16,395 --> 00:00:18,600 but your post office sends it out to 9 00:00:18,600 --> 00:00:20,560 another Sasha who lives out in New York. 10 00:00:20,560 --> 00:00:22,140 That would hopefully never happen 11 00:00:22,140 --> 00:00:23,925 since the post office has rules 12 00:00:23,925 --> 00:00:25,320 that they follow to make sure 13 00:00:25,320 --> 00:00:27,460 your letter is sent to the correct address. 14 00:00:27,460 --> 00:00:29,840 Our networking protocols do the same thing. 15 00:00:29,840 --> 00:00:31,500 There are rules that make sure 16 00:00:31,500 --> 00:00:33,810 our packets are routed efficiently, 17 00:00:33,810 --> 00:00:36,285 aren't corrupted, are secure, 18 00:00:36,285 --> 00:00:37,875 go to the right machine, 19 00:00:37,875 --> 00:00:39,420 and are named appropriately. 20 00:00:39,420 --> 00:00:41,270 You get the idea. We'll cover 21 00:00:41,270 --> 00:00:43,265 specific network protocols later on. 22 00:00:43,265 --> 00:00:46,205 But there are two protocols that you need to know. 23 00:00:46,205 --> 00:00:48,425 The Transmission Control Protocol 24 00:00:48,425 --> 00:00:50,045 and the Internet Protocol, 25 00:00:50,045 --> 00:00:52,130 or TCPIP for short, 26 00:00:52,130 --> 00:00:53,780 which had become the predominant 27 00:00:53,780 --> 00:00:55,300 protocols of the Internet. 28 00:00:55,300 --> 00:00:57,515 The Internet Protocol, or IP, 29 00:00:57,515 --> 00:00:59,000 is responsible for delivering 30 00:00:59,000 --> 00:01:01,010 our packets to the right computers. 31 00:01:01,010 --> 00:01:02,660 Remember those addresses that 32 00:01:02,660 --> 00:01:04,940 computers use to find something on a network? 33 00:01:04,940 --> 00:01:06,740 They're called IP addresses 34 00:01:06,740 --> 00:01:08,880 or Internet Protocol Addresses. 35 00:01:08,880 --> 00:01:11,890 The Internet Protocol helps us route information. 36 00:01:11,890 --> 00:01:15,755 The Transmission Control Protocol, or TCP, 37 00:01:15,755 --> 00:01:17,405 is a protocol that handles 38 00:01:17,405 --> 00:01:19,534 reliable delivery of information 39 00:01:19,534 --> 00:01:21,485 from one network to another. 40 00:01:21,485 --> 00:01:24,800 This protocol was an important part of the creation of 41 00:01:24,800 --> 00:01:26,630 the internet since it led us share 42 00:01:26,630 --> 00:01:28,745 information with other computers. 43 00:01:28,745 --> 00:01:30,320 For now, you've got 44 00:01:30,320 --> 00:01:31,970 a high level understanding of how 45 00:01:31,970 --> 00:01:35,310 the Internet works with TCP, IP. 3305