What Is Sequence Number In Tcp?
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What Is Sequence Number in TCP?
The transmission control protocol sequence number is a 4-byte field in the header of TCP that shows the first byte of the departing segments. TCP sequence also provides assistance to know how much data is transmitted and received. Even though there is no data in the segments but the transmission control protocol sequence number is always set.
For example, the TCP sequence number for this packet is y. The packet length is x. If this packet is forwarded to another site, then the sequence number of the next packet is X+Y. the transmission control protocol is the registered mail of the internet protocol. The delivery of postal mail can be sure with the mail carrier. On the other end when the mail is received recognition in the form of a signature is required. This signature shows that the mail is received successfully at the distant site.
Goals of the TCP sequence number:
It is the byte-oriented sequencing protocol. The sequence number is necessary it indicates the missing or disordered packets and also fixed this problem. If they arrived at data at the wrong destination and lost the transmission control protocol is capable of retransmitting the data and also restoring the data depending on the sequence number. Full duplex operation is supported by the TCP so the initial sequence number is decided by the clients and the server even though the flow of data is unidirectional on the particular connection.