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Question 25 - 312-38 discussion

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Which of the following is a 16-bit field that identifies the source port number of the application program in the host that is sending the segment?

A.
Sequence Number
Answers
A.
Sequence Number
B.
Header Length
Answers
B.
Header Length
C.
Acknowledgment Number
Answers
C.
Acknowledgment Number
D.
Source Port Address
Answers
D.
Source Port Address
Suggested answer: D

Explanation:

Source Port Address is a 16-bit field that identifies the source port number of the application program in the host that is sending the segment.

Answer option C is incorrect. This is a 32-bit field that identifies the byte number that the sender of the segment is expecting to receive from the receiver.

Answer option B is incorrect. This is a 4-bit field that defines the 4-byte words in the TCP header. The header length can be between 20 and 60 bytes. Therefore, the value of this field can be between 5 and 15. Answer option A is incorrect. This is a 32-bit field that identifies the number assigned to the first byte of data contained in the segment.

asked 18/09/2024
Tudor Voicu
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