|
|
Data packet, like a letter, is the basic unit of data transmission in the network. When we send or receive information on the network, these information will be divided into a single small block, which is a data packet. Each data packet It contains the address, data type, and a small part of the actual data of the sender and receiver. The structure of data package A typical data package usually consists of the following parts: Header: Contains control information, such as source address, destination address, protocol type, data length, etc. These information are like the address of the letter and postmark, telling the network equipment how to handle this data packet. Data part (Data): It is the actual data that we want to transfer , it can be text, image, audio, video etc. Checksum: Used to check whether errors occur during data transmission.
Split a large amount of data into Phone Number multiple small packets, which can improve transmission efficiency and reduce transmission risk. If a data packet is lost, you only need to retransmit the packet, rather than retransmit the entire file. Routing selection: The header of each data packet contains the destination address, and the network device selects the best routing path based on this address, and the data packet is forwarded to the destination. Flow control: By controlling the transmission rate of data packets, network congestion can be avoided. Data transfer process Encapsulation: Data is encapsulated in the source device. Transmission: The data package is transmitted through the network, through multiple routers. Routing: The router selects the appropriate path according to the address information in the data packet. Decompression: After the target device receives the data package, extract the data from it. Classification of data packages IP data package: Internet protocol data package, is the most common data package type on the Internet. TCP data package: transmission control protocol data package, used to ensure the reliable transmission of data. UDP data package: user data protocol protocol data package, used for applications that do not require reliable transmission. Why do you need data package? Improve network efficiency: segmented transmission can improve network utilization rate, reduce transmission delay.
|
|
发新帖
