For example, there are multiple types of segments. The header conveys the purpose of a segment. TCP sends the content (user data) to the serving HTTP module over that port. If protocol finds an application for a port received in the TCP header. On the TCP layer, an application address is the TCP port number. On the webserver, TCP reads the header and finds the application address. Upon a web request from the web browser, TCP adds a header to the HTTP data and sends it to the IP layer. TCP header explanation: TCP header in a messageįor example, a web request uses the TCP/IP protocol. Because of this, the header is added before the user data. The header bytes reach first to the receiver, to process the message as per protocol. The control information is called the TCP header. Later conveys the purpose, size, and how a receiver should handle the message. Before any explanation, we should know what a header in the computer network is?Ī network message has two parts, one is actual user or application data, and another is the protocol information to process the message. In this tutorial, we will explain the header format and details of each parameter of the header. Each segment has two parts, one is a TCP header, and the other is user/application data. The unit of transfer is named as TCP segment. TCP transfers messages reliably, from one machine to another over the underlying IP network.
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