Question

Which one of the following is TRUE about the interior gateway routing protocols – Routing Information Protocol (RIP) and Open Shortest Path First (OSPF)
1. RIP uses distance vector routing and OSPF uses link state routing
2. OSPF uses distance vector routing and RIP uses link state routing
3. Both RIP and OSPF use link state routing
4. Both RIP and OSPF use distance vector routing

Answer 1

Correct Answer - Option 1 : RIP uses distance vector routing and OSPF uses link state routing

• Routing Information Protocol (RIP) and Open Shortest Path First (OSPF) are Interior Gateway Protocol, i.e., they both are used within an autonomous system.
• RIP is an old protocol (not used anymore) based on distance vector routing. OSPF is based on Link State Routing. Therefore option 1 is correct

Important Point:

• RIP is a dynamic routing protocol which uses hop count as a routing metric between source and destination. RIP uses the UDP protocol for transmission of data.
• OSPF is a link state routing protocol which uses multicast address to find the best path between source and destination. As, TCP does not support multicasting. So, OSPF packets are not sent using TCP.