OSPF uses cost as its routing metric .
cost is calculated for every outgoing interface of a router through which packets transfer.
it is calculated by the formula
cost = 100000000/(bandwidth of output interface)
most likely bandwidth of serial int is 1544kb= 1544000 bytes
PS: all cost calculation to be done in bytes for ease
OSPF is short form of open shortest path first. OSPF is based on linked state routing.
There are actually two OSPF and IS-IS
OSPF stands for open shortest path first. OSPF is an exterior routing protocol. OSPF uses Path vector routing algorithm.
Rip ospf
OSPF is short form of open shortest path first. OSPF is based on linked state routing.
OSPF is a link-state routing protocol.
Both uses Distance vector algorithm...... . updates the routing table for every 30 seconds. and in OSPF requires hoping reneval of routing table
Router R1 is participating in the OSPF routing protocol as well as the EIGRP routing protocol. If R1 learns of network 192.168.10.0/24 from both the OSPF and internal EIGRP routing protocols, how will the route appear in the routing table of R1?
ospf and static route
OSPF is a classless link-state routing protocol. RIP version 1 and IGRP are both classful distance vector routing protocols, EIGRP is a hybrid protocol that supports classless addressing.
Delay and bandwidth
OSPF is a link-state routing protocol that helps Routers exchange IP routes. OSPF Adjacencies is the established "neighborship" between two OSPF routers in order to make the exchange of routes. In this case, Adjacency means the same as "peering", that the OSPF speakers (routers) are able to "talk" to each other.