Question: In TCP, ________ retransmission timer is set for an ACK segment.
Answer:
- In TCP, a retransmission timer is set for a data segment, not for an ACK segment.
- When a sender transmits a data segment, it starts a timer. If the sender does not receive an acknowledgment (ACK) from the receiver within the specified time, it assumes that the data segment was lost and retransmits it. The retransmission timer value is dynamically adjusted based on network conditions and can be different for each segment sent. This process is known as the TCP retransmission timeout (RTO) mechanism.
- The ACK segment itself does not require a timer as it is sent by the receiver immediately after receiving the data segment, acknowledging its receipt.
MCQ: In TCP, ________ retransmission timer is set for an ACK segment.
Correct Answer:
A. one
Explanation:
- In TCP, a retransmission timer is set for a data segment, not for an ACK segment.
- When a sender transmits a data segment, it starts a timer. If the sender does not receive an acknowledgment (ACK) from the receiver within the specified time, it assumes that the data segment was lost and retransmits it. The retransmission timer value is dynamically adjusted based on network conditions and can be different for each segment sent. This process is known as the TCP retransmission timeout (RTO) mechanism.
- The ACK segment itself does not require a timer as it is sent by the receiver immediately after receiving the data segment, acknowledging its receipt.
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Related Questions
- 1. In TCP, there can be ______ RTT measurement(s) in progress at any time.
- 2. We need to multiply the header length field by _______ to find the total number of bytes in the TCP header.
- 3. In TCP, urgent data requires the urgent pointer field as well as the URG bit (to be set) in the _______ field.
- 4. In TCP, if the ACK value is 200, then byte _______ has been received successfully.
- 5. In TCP, the _______ timer prevents a long idle connection between two TCPs.
- 6. In TCP, the _______ timer is needed to handle the zero window-size advertisement.
- 7. In TCP, Karn's algorithm is used in calculations by the _______ timer.
- 8. In TCP, a special segment called a probe is sent by a sending TCP when the _______ timer goes off.
- 9. __________ control refers to the mechanisms and techniques to keep the load below the capacity.
- 10. In TCP's ________ algorithm the size of the congestion window increases exponentially until it reaches a threshold.
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