Q91.Marks: +2.0UGC NET Paper 2: Computer Science 7th Dec 2023 Shift 2
Which of the following is not a field in TCP header ?
1.Sequence Number
2.Checksum
3.Fregmentation offset ✓ Correct
4.Window size
Solution
The correct answer is Fregmentation offset
Key Points
Fragmentation Offset:
This is not a field in the TCP header; rather, it is a field in the IP header. The IP protocol allows large packets to be fragmented into smaller fragments for transmission over networks with smaller Maximum Transmission Unit (MTU) sizes.
The fragmentation offset field in the IP header indicates the position of a fragment in the original, unfragmented packet.
Additional Information
Sequence Number:
This field in the TCP header is used to identify the order of the bytes sent in a TCP connection. It is crucial for ensuring that the data is received in the correct order and for handling retransmissions.
Checksum:
The checksum field in the TCP header is used for error-checking purposes. It helps verify the integrity of the TCP header and data. The sender calculates the checksum based on the contents of the TCP header and data, and the receiver verifies it to detect any transmission errors.
Window Size:
The window size field in the TCP header is used to manage flow control in a TCP connection. It indicates the amount of data, in bytes, that can be sent by the sender before an acknowledgment is required from the receiver. Adjusting the window size allows for efficient data transfer and congestion control.
