TCP Header Format in Computer Networks

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In this class, we will try to understand TCP Header Format in Computer Networks.

We have already discussed the concepts of Transport layer protocols TCP and UDP in our previous class.

The image is the transport layer header format.

The structure of the TCP header is very much same as the network layer header.

Each row of the TCP header is 32 bit (4 Bytes) long.

The first 5 rows (20 Bytes) of the TCP Header are the mandatory fields.

Next 40 Bytes of the data is optional data.

In TCP the data part is also optional because during the connection establishment only the header will be transmitted.

Clear understanding of each field of the header will be made our next classes.