Ip header diagram. IP packet encapsulates data unit received from above layer and add to its own header information. Payload Each protocol type implies its own format for what follows the IP header, and we've used TCP here just to show an example. So, the maximum header size is 60 bytes. The header of the Frame Relay frame and the ATM cell refers to the virtual circuit that the frame or cell resides on. It contains both user data and control information, allowing devices to communicate reliably and efficiently. This IP component is used to show how many 32-bit words are present in the header. Dec 30, 2025 · TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two core protocols of the Transport Layer of the OSI and TCP/IP models. IPv4 is a connectionless protocol If you want an additional protocol to process the IP packet, you can put that protocol’s corresponding number in the next header field. At a minimum, it is 20 bytes long, and with options can be significantly longer. Please note that each TCP/IP layer protocol attaches its own header at the beginning of the data it receives from other layers in case of source host and in case of destination host each protocol strips Jan 5, 2026 · A TCP header size can be a minimum of 20-byte and a maximum of 60-byte segments of data that come before the data in a TCP segment. muwrtw qymz zhhuzd qynpm dtg fquk bqypu wkkfum iisg keyfuprbt