Application layer protocol defines_____________________?
Correct answer: D. all of these
- A. types of messages exchanged
- B. message format, syntax and semantics
- C. rules for when and how processes send and respond to messages
- D. all of these
Explanation
An application-layer protocol specifies what messages mean, how they are formatted, and the rules governing when processes send and answer them. Therefore, all the listed responsibilities are included.
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