In the process of data processing, the following figure takes the email sent by user a to user B as an example: 1. During application processing, priority can be given to coding to achieve its own surface function. After coding transformation, the email cannot be sent immediately. When to connect communication, when to send data and other management functions are similar to the session layer functions of OSI. 2. Be responsible for connection, transmission and disconnection according to the processing requirements of TCP module. TCP provides stable data transmission from application layer to peer. In order to realize this function, we need to add TCP header information before the user's data. 3 IP module IP processing integrates the TCP header and TCP sending data into its own data, and adds its own IP header in front of the TCP header. After creating the IP packet, refer to the flow control table to confirm the transmission volume or host of the IP packet. The processing of IP box of 4 network port (driven by Ethernet) is Ethernet data. If you add this header to transmit data, the data will be transmitted to the sea altar through the physical layer. 5. After the host receives the Ethernet signal, the network interface processing host shall first take out the MAC address to be transmitted to itself from the Ethernet head (MAC), otherwise the relevant data will be lost. If the data is transmitted to the author, the data type can be determined according to the type of Ethernet data port and transmitted to the corresponding module (IP, ARP). This example is IP. 6 the IP module will process the IP module and perform similar processing after receiving the data. Check whether the IP address matches its own IP address based on the packet header. If all information is consistent, data will be transmitted to the corresponding module according to "header protocol type (TCP, UDP)" such as TCP and UDP. The example here is TCP. Moreover, the acceptance of a router is usually not its own address. At this point, use a router or router to check the router and send information. 7、 For the processing of the TCP module, the TCP module first calculates and rechecks, and then judges whether the data has been damaged. Give it a number, and then check if it receives data. Finally, check your port number to determine the specific application. After receiving all the data, it will be sent to the program displaying the dialing log. The 8 processor application will receive data directly from the sending clip. The corresponding contents can be displayed by anatomic data.<br>
正在翻译中..