How does OSPF work in networking?
OSPF is a routing protocol.
Two routers speaking OSPF to each other exchange information about the routes they know about and the cost for them to get there.
OSPF routers rely on cost to compute the shortest path through the network between themselves and a remote router or network destination..
Can OSPF be used as EGP?
IGPs include RIP, EIGRP, OSPF, and IS-IS. Exterior Gateway Protocols (EGP): Used for routing between autonomous systems. … Service providers and large companies may interconnect using an EGP. The Border Gateway Protocol (BGP) is the only currently viable EGP and is the official routing protocol used by the Internet.
Why we use OSPF?
The idea behind the OSPF areas is to lower the amount of routing traffic and lower the processing of your core routers. Different areas are connected with each other through Area Border Router (ABR). OSPF is link state routing protocol and you can tune a link state routing protocol to converge fast.
Which layer is OSPF?
OSI layer designation IS-IS runs on the data link layer (Layer 2) Open Shortest Path First (OSPF) is encapsulated in IP, but runs only on the IPv4 subnet, while the IPv6 version runs on the link using only link-local addressing. IGRP, and EIGRP are directly encapsulated in IP.
Does OSPF use TCP or UDP?
OSPF messages Unlike other routing protocols, OSPF does not carry data via a transport protocol, such as the User Datagram Protocol (UDP) or the Transmission Control Protocol (TCP). Instead, OSPF forms IP datagrams directly, packaging them using protocol number 89 for the IP Protocol field.