Testbook CN question

Question

Which of the following statement is/are incorrect about the Routing Information Protocol (RIP) protocol and Open Shortest Path First (OSPF) protocol?

• RIP packets are sent using TCP.

• OSPF packets are sent using TCP.

• RIP is an Network Layer protocol

• OSPF is an Application Layer protocol

Answer 1

• Routing information protocol(RIP) packets are sent using UDP transport layer protocol with port no. 520
   
• Open shortest path first(OSPF) does not use a transport protocol such as UDP or TCP but encapsulates its data directly into IP Packets.
   
• Though RIP & OSPF protocols are taught under the network layer, RIP/OSPF runs in the application layer to help in table formation 
   
• Therefore options (a), (b), (c) are false and only option (d) is correct

Source:- https://support.tetcos.com/support/solutions/articles/14000057056-why-are-rip-and-ospf-protocols-listed-under-application-layer-of-router-