Question: In TCP, an ACK segment, if carrying no data, consumes ______ sequence number(s).
Answer:
- In TCP (Transmission Control Protocol), an ACK (Acknowledgment) segment that carries no data consumes one sequence number.
- An ACK segment is sent by a TCP receiver to acknowledge the receipt of one or more TCP segments sent by the sender. If the ACK segment carries no data, it still contains an acknowledgment number that acknowledges the receipt of the last byte of data received successfully.
- The sequence numbers in TCP are used to number the bytes of data in a connection. Therefore, the ACK segment consumes one sequence number to acknowledge the receipt of the last byte of data received successfully. If the ACK segment carries data, it will consume an additional sequence number to indicate the sequence number of the first byte of data carried in the segment.
- Once the connection is established, the sequence number will be incremented by the number of bytes sent, and the acknowledgment number will be incremented by the number of bytes received. This ensures that both hosts keep track of the progress of the data transfer and can detect any lost or corrupted segments.
MCQ: In TCP, an ACK segment, if carrying no data, consumes ______ sequence number(s).
Correct Answer:
A. no
Explanation:
- In TCP (Transmission Control Protocol), an ACK (Acknowledgment) segment that carries no data consumes one sequence number.
- An ACK segment is sent by a TCP receiver to acknowledge the receipt of one or more TCP segments sent by the sender. If the ACK segment carries no data, it still contains an acknowledgment number that acknowledges the receipt of the last byte of data received successfully.
- The sequence numbers in TCP are used to number the bytes of data in a connection. Therefore, the ACK segment consumes one sequence number to acknowledge the receipt of the last byte of data received successfully. If the ACK segment carries data, it will consume an additional sequence number to indicate the sequence number of the first byte of data carried in the segment.
- Once the connection is established, the sequence number will be incremented by the number of bytes sent, and the acknowledgment number will be incremented by the number of bytes received. This ensures that both hosts keep track of the progress of the data transfer and can detect any lost or corrupted segments.
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Related Questions
- 1. The connection establishment procedure in TCP is susceptible to a serious security problem called the _________ attack.
- 2. The SYN flooding attack belongs to a group of security attacks known as a _____ attack.
- 3. In TCP, a FIN segment consumes ____ sequence numbers if it does not carry data.
- 4. In TCP, a FIN + ACK segment consumes _____ sequence number(s) if it does not carry data.
- 5. In TCP, one end can stop sending data while still receiving data. This is called a ______ termination.
- 6. TCP sliding windows are __________ oriented.
- 7. In TCP, the size of the send window is the ________ of <em>rwnd</em> and <em>cwnd</em>.
- 8. In TCP, the window should not be _________.
- 9. In TCP, the receiver can temporarily shut down the window; the sender, however, can always send a segment of _____ byte(s) after the window is shut down.
- 10. A serious problem can arise in the sliding window operation when either the sending application program creates data slowly or the receiving application program consumes data slowly, or both. This problem is called the ______.
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