Question
The protocol data unit (PDU) for the application layer in the Internet stack is
Official answer and solution
- Official answer
- C
- From
- Official GATE 2012 answer key
Solution
Recall the designated names of Protocol Data Units (PDUs) across each layer of the Internet protocol suite.
The Protocol Data Units (PDUs) at different layers of the Internet stack are:
- Application Layer: Message
- Transport Layer: Segment (for TCP) or User Datagram (for UDP)
- Network Layer: Datagram (or Packet)
- Data Link Layer: Frame
- Physical Layer: Bits
Therefore, the PDU for the application layer is Message, corresponding to option (C).
Final answer
C
The answer is the one in the official GATE answer key. The solution is this site's own explanation.
Source
- Paper
- GATE 2012 Computer Science and Information Technology (CS)
- Question
- 10 of 65, printed as CS Q.10
- Section
- Computer Science and Information Technology
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