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These are the user uploaded subtitles that are being translated: 1 00:00:00,730 --> 00:00:04,390 What is TPP. 2 00:00:04,430 --> 00:00:11,330 I'm glad you asked because it was first developed in the US as a military project called ARPANET Advanced 3 00:00:11,480 --> 00:00:15,110 Research Projects Agency Network. 4 00:00:15,120 --> 00:00:23,500 This project was developed by the military for military purposes was then used by university and subsequently 5 00:00:23,500 --> 00:00:30,010 networks developed independently from all over the U.S. and those were named NSF that under a single 6 00:00:30,010 --> 00:00:37,630 backbone and then spread across a world beyond the original national dimension so actually that flash 7 00:00:37,630 --> 00:00:45,360 point or the birth of the Internet coincides with this state so that's where we get the protocols that 8 00:00:45,360 --> 00:00:52,760 will govern that network they regulate the flow of data between computers so then TI CPI IP represents 9 00:00:52,910 --> 00:00:59,330 two separate protocols that operate on the third and the fourth layer of the OS I model for data transfer 10 00:00:59,330 --> 00:01:07,430 over the Internet and consequently they're called Transmission Control Protocol TGP and Internet Protocol 11 00:01:07,640 --> 00:01:12,370 or IP so why DCP IP 12 00:01:15,160 --> 00:01:21,900 so it's all manufacturer independent they connect different scale of computers 13 00:01:24,970 --> 00:01:32,740 they can be used to exchange data between different operating system they recognize and they were in 14 00:01:32,740 --> 00:01:41,590 use by many companies as the first vertical course they're widely used over the Internet it's a roundabout 15 00:01:41,590 --> 00:01:52,350 protocol they have a common addressing scheme in the DCP IP operation model is shown here 16 00:01:55,180 --> 00:02:02,720 application layer this layer contains the application that sends the data and the protocol that this 17 00:02:02,720 --> 00:02:05,060 application uses. 18 00:02:05,160 --> 00:02:13,100 So this is a layer that the user interacts with so here in contain the various protocols for the user 19 00:02:13,100 --> 00:02:22,930 to use so these protocols correspond to the application that are activated by the user. 20 00:02:22,960 --> 00:02:29,500 So for example the HDP protocol is activated when the user wants to open a web page. 21 00:02:29,500 --> 00:02:37,800 If the user wants to send an email and the S.M. tepee protocol will be activated transmission layer 22 00:02:39,430 --> 00:02:49,350 DCP and UDP protocols work in this layer transport layer has the following properties session multiplexes. 23 00:02:49,440 --> 00:02:52,780 So multiple machines can be connected at the same time. 24 00:02:54,180 --> 00:02:56,160 Data fragmentation. 25 00:02:56,160 --> 00:03:05,960 So data can be divided into segments the data to be sent can be divided into pieces low control connection 26 00:03:05,960 --> 00:03:14,430 can be put on hold for many reasons during data transmission data can be resumed when conditions are 27 00:03:14,430 --> 00:03:22,650 appropriate and that's how flow control works pretty much there is a connection oriented feature so 28 00:03:22,650 --> 00:03:28,900 it means that before the data gets transferred the relevant parties must establish a connection. 29 00:03:29,040 --> 00:03:37,040 Data transmission will not start until the connection is established the network layer data is transferred 30 00:03:37,040 --> 00:03:43,520 to the network card and in this layer the data is converted into electrical signals whether it's a wireless 31 00:03:43,520 --> 00:03:52,700 card or in either net card the physical layer so that's the layer where the data is transmitted by a 32 00:03:52,700 --> 00:04:01,060 physical cable whether it's fiber or copper for example when you open a web page the following operations 33 00:04:01,060 --> 00:04:05,440 will be performed on a server where the web page is located. 34 00:04:05,450 --> 00:04:16,250 The output of the web page in HMO format is created and the command to send this data via HD TTP protocol. 35 00:04:16,280 --> 00:04:20,790 This is done in Layer 4 the application layer. 36 00:04:20,870 --> 00:04:23,190 Data is sent to layer 3 from here. 37 00:04:24,540 --> 00:04:31,760 Then the transport layer the data port information data size and information will be added and then 38 00:04:31,760 --> 00:04:35,900 in the network layer the IP address of the server computer. 39 00:04:35,900 --> 00:04:40,400 And the final size of the data sites are added to the data package. 40 00:04:42,200 --> 00:04:50,160 Then in the physical layer the physical address information and the final data size are added in the 41 00:04:50,160 --> 00:04:53,840 package exit the server and reaches your computer. 42 00:04:55,210 --> 00:04:59,670 And of course when it reaches your computer the operations are repeated in reverse. 43 00:04:59,990 --> 00:05:06,800 So it handles a physical layer then the network layer then the transport layer and then the application 44 00:05:06,800 --> 00:05:14,360 layer and then finally it sends the remaining package to your web browser and that's when the page opens 45 00:05:17,220 --> 00:05:28,100 DCP IP flags so in communicating with DCP IP some flags are used to check the security of the connection 46 00:05:29,300 --> 00:05:35,560 so these flags will start their communication with the other party the communication ends when the data 47 00:05:35,560 --> 00:05:43,600 flow is finished and it is confirmed that it is a suitable environment for data transfer so there are 48 00:05:43,600 --> 00:05:53,620 six TPP flags and these are Syn which is a flag that initiates a connection request with a new sequence 49 00:05:53,640 --> 00:05:53,970 No 50 00:05:57,220 --> 00:06:04,120 the acknowledge flag specifies that the data transfer request is confirmed along with the expected sequence 51 00:06:04,150 --> 00:06:11,310 number push the flag indicating that the system accepts that connection request and sends the buffered 52 00:06:11,310 --> 00:06:19,590 information erg is the flag that specifies that the packet carrying the flag is transmitted as quickly 53 00:06:19,590 --> 00:06:20,250 as possible. 54 00:06:21,680 --> 00:06:28,970 Finn is a flag that indicates it no more information can be sent and the connection should be terminated 55 00:06:30,370 --> 00:06:35,130 and reset is a flag that resets the connection. 56 00:06:37,410 --> 00:06:47,170 Re way handshake so before TPP data transfers will start the parties must verify each other and this 57 00:06:47,170 --> 00:06:49,660 method is called the three way handshake. 58 00:06:50,530 --> 00:06:56,690 So it works as follows two computers and these are let's say host day and host B. 59 00:06:56,740 --> 00:06:59,930 Now suppose we want to transfer data from host to host B. 60 00:07:00,530 --> 00:07:04,010 So step 1 0 stay sends this packet. 61 00:07:04,010 --> 00:07:11,450 So in this package the since shelf is set to 1 and also included in the package is the sequence number. 62 00:07:11,520 --> 00:07:20,710 Information step two was to be receives a package from host a and prepares a package descent. 63 00:07:20,720 --> 00:07:30,010 So in this package the an EC flags are set to 1 it also adds host B's sequence number as well as the 64 00:07:30,010 --> 00:07:40,000 acknowledgement number to host a and then step 3 most day receives the packet from host B and sets the 65 00:07:40,000 --> 00:07:48,270 EC flag to 1 sending it to those B by adding the acknowledgement number and that completes the three 66 00:07:48,270 --> 00:08:00,590 way handshake what is UDP UDP is the user diagram protocol and it's one of the two transport layer protocols 67 00:08:00,590 --> 00:08:02,910 of DCP IP protocols. 68 00:08:03,610 --> 00:08:12,020 So it sends data without making a connection UDP is an on reliable transfer protocol it's used in real 69 00:08:12,020 --> 00:08:18,590 time data transfers such as audio and video transmission in wide area networks or whens it minimizes 70 00:08:18,590 --> 00:08:25,760 data transmission time by not performing UDP connection setup operations flow control and retransmission 71 00:08:25,760 --> 00:08:30,790 operation so on UDP and DCP use the same communication path. 72 00:08:31,040 --> 00:08:39,560 The quality of service of real time data transfer with UDP decreases due to the high data traffic generated 73 00:08:39,560 --> 00:08:41,630 by DCP. 74 00:08:41,630 --> 00:08:50,930 Some of the protocols use UDP or DNS DFT IP and as an MP protocols application programmers prefer UDP 75 00:08:50,930 --> 00:08:56,570 over DCP because UDP does not occupy much bandwidth on the network. 9352