Given below are two statements : Statement (I) : In datagram network - routers…
2023
Given below are two statements :
Statement (I) : In datagram network - routers hold state information about connections
Statement (II) : In virtual circuit network - each virtual circuit requires router table space per connection
In the light of the above statements, choose the most appropriate answer from the options given below :
Answer: D. Statement I is incorrect but statement II are correct — Answer: Statement I is incorrect; Statement II is correct. Why Statement I is incorrect: Datagram networks are connectionless. Routers forward each packet…
- A.
Both Statement I and Statement II are correct
- B.
Both Statement I and Statement II are incorrect
- C.
Statement I is correct but statement II are incorrect
- D.
Statement I is incorrect but statement II are correct
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Correct answer: D
Answer: Statement I is incorrect; Statement II is correct.
Why Statement I is incorrect: Datagram networks are connectionless. Routers forward each packet independently using the packet's destination address and their routing tables; they do not maintain per-connection state.
Why Statement II is correct: Virtual circuit networks establish a path before data transfer. Each router on the path stores forwarding information (for example, mapping an incoming virtual circuit identifier to an outgoing interface and new identifier), so router table space is required per virtual circuit.
Takeaway: Datagram = connectionless (no per-connection router state). Virtual circuit = connection-oriented (per-connection state stored in routers).
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