What is the role of the checksum in TCP communication?
When you send or receive data over the internet, you want to make sure that it is not corrupted or tampered with. That is why TCP, the protocol that manages reliable data transmission, uses a checksum to verify the integrity of each packet. A checksum is a mathematical value that is calculated from the data in the packet and attached to it before sending. The receiver then recalculates the checksum from the received data and compares it with the one sent by the sender. If they match, the packet is accepted; if they differ, the packet is rejected and a request for retransmission is sent. In this article, you will learn more about the role of the checksum in TCP communication and how it works.