Which field in a TCP header acts as a de facto acknowledgment for all previously sent data?
Understand the Problem
The question is asking which field in a TCP header serves as the acknowledgment for all previously sent data, highlighting the importance of the acknowledgment number in TCP communication.
Answer
Acknowledgment Number field.
The 'Acknowledgment Number' field in a TCP header acts as a de facto acknowledgment for all previously sent data.
Answer for screen readers
The 'Acknowledgment Number' field in a TCP header acts as a de facto acknowledgment for all previously sent data.
More Information
In TCP, the acknowledgment number indicates the next expected byte and implicitly acknowledges all previous bytes, providing reliable data communication between sender and receiver.
Tips
A common error is to confuse the acknowledgment field with the FLAGS field, which includes an ACK flag but does not specify which data is acknowledged.
Sources
- TCP header field definitions - IBM - ibm.com
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