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Question: In TCP, urgent data requires the urgent pointer field as well as the URG bit (to be set) in the _______ field.

Answer:

MCQ: In TCP, urgent data requires the urgent pointer field as well as the URG bit (to be set) in the _______ field.

Correct Answer: A. control

Explanation:

  • In TCP, urgent data requires the urgent pointer field as well as the URG bit (to be set) in the TCP header's Control Bits field.
  • The urgent pointer is a 16-bit field in the TCP header that is used to indicate the end of the urgent data within a TCP segment. It points to the byte following the last urgent data byte and is relative to the sequence number field in the TCP header.
  • The URG bit is one of the control bits in the TCP header and is used to indicate the presence of urgent data. When the URG bit is set to 1, it indicates that the urgent pointer field is valid and that the data following the pointer is urgent. If the URG bit is set to 0, then the urgent pointer field is not used, and the segment does not contain urgent data.
  • Together, the urgent pointer field and the URG bit allow TCP to support the transmission of urgent data within a stream of data. When a receiver receives a TCP segment with urgent data, it can process the urgent data immediately and notify the application if necessary.

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