GATE CS 2017 Set 2 — Question 9
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Computer Networks → Network Layer: Routing → Distance Vector Routing
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Question
Consider the following statements about the routing protocols, Routing Information Protocol (RIP) and Open Shortest Path First (OSPF) in an IPv4 network.I: RIP uses distance vector routing
II: RIP packets are sent using UDP
III: OSPF packets are sent using TCP
IV: OSPF operation is based on link-state routingWhich of the statements above are CORRECT?
II: RIP packets are sent using UDP
III: OSPF packets are sent using TCP
IV: OSPF operation is based on link-state routingWhich of the statements above are CORRECT?
Correct answer
(C) I, II and IV only
Solution
- Statement I: RIP is a distance-vector routing protocol. Correct.
- Statement II: RIP uses UDP as its transport protocol (port 520). Correct.
- Statement III: OSPF does not use TCP or UDP. It encapsulates its data directly into IP packets with protocol number 89. Incorrect.
- Statement IV: OSPF is a link-state routing protocol. Correct.
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