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10 Answers

Best answer
82 votes
82 votes

(C) Message is the answer.

For Application, Presentation and Session layers, the PDU is message

For Transport layer, PDU is segment for TCP and datagram for UDP

For Network layer, PDU is packet

For Datalink layer, PDU is frames

For physical layer, PDU is stream of bits

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10 votes
10 votes
PDU for the presentation layer is messages.

PDU for transport layer is segment.

PDU for network layer is packet or datagram.

PDU for datalink layer is frame .

PDU for physical layer are bit streams .
5 votes
5 votes
Option-C
In Netwok layer PDU is called as Datagram.

In transport layer ,PDU is called as Segment.

Whereas In the application layer the PDU is called as the Message.
2 votes
2 votes
PDU for application layer is message.
 For transport layer is segment.
  For network layer is packet or datagram.
   For datalink layer is frame and for physical layer is bit streams.
Answer:

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