6 votes 6 votes 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 Computer Networks made-easy-test-series computer-networks datagram tcp network-layering + – rahul sharma 5 asked Dec 29, 2017 retagged Mar 6, 2019 by Aditi Singh rahul sharma 5 1.7k views answer comment Share Follow See all 5 Comments See all 5 5 Comments reply Ajay Jadhav commented Dec 29, 2017 reply Follow Share option D 1 votes 1 votes rahul sharma 5 commented Dec 29, 2017 reply Follow Share Can you tell what S1 is saying and why is it false? 0 votes 0 votes Ajay Jadhav commented Dec 29, 2017 reply Follow Share https://stackoverflow.com/questions/11636405/definition-of-network-units-fragment-segment-packet-frame-datagram for application layer it is called as Message 0 votes 0 votes Ashwani Kumar 2 commented Dec 29, 2017 i edited by akash.dinkar12 May 28, 2019 reply Follow Share Yes option d) is correct $$\begin{array}{|l|l|}\hline \textbf{Layers} & \textbf{PDU(Protocol Data Unit)}\\\hline \text{Application Layer} & \text{Message}\\\hline \text{Transport Layer} & \text{Segment}\\\hline \text{Network Layer} & \text{Packet}\\\hline \text{Data Link Layer} & \text{Frame}\\\hline \end{array}$$ 2 votes 2 votes Ajay Jadhav commented Dec 29, 2017 reply Follow Share packet is general term used for all layers for network layer I think term ' Datagram' is used 0 votes 0 votes Please log in or register to add a comment.
Best answer 5 votes 5 votes Answer : D S1 is false. For application layer PDU is Message. (Note : Datagram is PDU at transport Layer for UDP) S2 is false. Application layer can send any amount of data to transport layer. (Reference : https://gateoverflow.in/412/gate2008-14-isro2016-74) noob_coder answered May 27, 2019 selected May 27, 2019 by akash.dinkar12 noob_coder comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 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. aasia answered Apr 21, 2019 aasia comment Share Follow See 1 comment See all 1 1 comment reply noob_coder commented May 27, 2019 reply Follow Share s2 is false. reference https://gateoverflow.in/412/gate2008-14-isro2016-74 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes PDU is considered as datagram at the network layer. hence s1 is wong aasia answered Apr 21, 2019 aasia comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 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. Sanandan answered Sep 17, 2020 Sanandan comment Share Follow See all 0 reply Please log in or register to add a comment.