Which layer is the Routing protocol represented in the OSI model?

[subashjung2011]

Hello friends,

I am a student with surface level of knowledge in networking and looking for some ideas about OSI layer models.I am confused "Is routing protocol belong to network layer of the OSI model or it is the Application layer?".Please help me out with the logical reasoning.

Thanks in advance!

Subash Basnet

subashjung2011@yahoo.com

[Muhammad Thanveer · Accepted solution]

Hello Subash,

There is a lot of discussions happend earlier even.

Now as per my understanding first of all routing job is done be a layer3 device using these protocols. All of them affect the routing table of a layer 3 device...

We call a device layer 3 when it does a network routing job....

BGP=TCP port 179(L4 or L7) uses a layer 4 tcp port as if an application

RIP = UDP port 520 (L4 or L7) uses a layer 4 udp port as if an application

OSPF = IP protocol 89 (L3)

EIGRP = IP protocol 88 (L3)

IS-IS = CLNS protocol (L2) connection less network service it runs at data link layer..

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Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."