Does RIP work at layer 3 of OSI model or a higher layer? Because I saw in a book it says that RIPng uses UDP port number 521. If RIP uses a UDP port number, then it has to work at a higher layer, doesn't it?
Please someone clarify this to me.
Thanks in advance!
Rip & RIPng are layer 3 protocols and these protocols generate and multicast updates every 30 seconds by default.
These update packets are carried by the transport layer protocol UDP and use UDP port 521.