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This article shows you how the TCP protocol ensures reliable transmission, the content is concise and easy to understand, and can definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

The application data is divided into blocks that TCP considers most suitable for transmission.

TCP numbers each packet sent, and the receiver sorts the packets and transmits the ordered data to the application layer.

Checksum: TCP will maintain its header and data checksum. This is an end-to-end checksum designed to detect any changes in the data during transmission. If there is an error in the inspection of the received paragraph, TCP will discard the message paragraph and do not acknowledge receipt of the message paragraph.

The receiver of the TCP discards duplicate data.

Flow control: each side of the TCP connection has a fixed buffer space, and the receiver of the TCP only allows the sender to send data that can be accepted by the receiver buffer. When the receiver does not have time to process the sender's data, it can prompt the sender to reduce the transmission rate and prevent packet loss. The flow control protocol used by TCP is a variable size sliding window protocol. (TCP uses sliding window to realize flow control)

Congestion control: reduce the transmission of data when the network is congested.

ARQ protocol: also to achieve reliable transmission, its basic principle is to stop sending every packet, waiting for the other party to confirm. Send the next packet after receiving the confirmation.

Timeout retransmission: when TCP sends out a segment, it starts a timer and waits for the destination to acknowledge receipt of the segment. If a confirmation is not received in time, the message will be re-sent.

The above is how the TCP protocol ensures reliable transmission. Have you learned the knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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