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Consider the following statements with respect to application layer:
S1 : Datagram is the PDU (Protocol data unit) used.
S2 : There is a fixed limit on the maximum size of data that it can pass on the TCP layer.
Which of the following options is correct?

A Only S1 is true

B Only S2 is true

C Both S1 and S2 are true

D Neither of S1 or S2 is true

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4 Answers

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s2 is correct .bcz ip4 has 16 bits for total length and max size calculated as total length subtract ipv4 header size and thn subtract tcp header size. if both header size consider minimum in size that is 20 thn 2^16 subtract 2*20 =65495 is size of segment.
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PDU is considered as datagram at the network layer. hence s1 is wong
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Option D) is correct.

S1: Datagram is of network layer, in Application layer Message is PDU.

S2: Application Layer can send any amount of data to the transport layer.
Answer:

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