NIELIT 2016 DEC Scientist B (IT) - Section B: 49

Question

Application layer protocol defines:

• A. types of messages exchanged
• B. rules for when and how processes send and respond to messages
• C. message format, syntax and semantics
• D. all of the above

Answer 1

Option D

 

Application layer deals with the user interface, what message is to be sent or the message format, syntax and semantics. A user has access to application layer for sending and receiving messages.

Answer 2

The data unit created at the application layer is called a message.

So all types of tasks are performed on message during Application layer.

Answer 3

Application layer protocol defines:

1. types of messages exchanged
2. rules for when and how processes send and respond to messages
3. message format, syntax and semantics

 

THEREFORE

OPTION D