Скачать или смотреть OSPF – Open Shortest Path First in internet protocol | Computer networks

OSPF -this is a link state IGP, which became an Internet standard in 1990.
When routing a datagram, a router running OSPF uses both the destination address and type of service fields in the IP Header to choose a route.
OSPF provides load balancing. If there are multiple routes to a given destination at the same cost, OSPF distributes traffic over all the routes equally.
OSPF protocol specifies that all exchanges between the routers be authenticated.
OSPF also allows for routers to exchange routing information learned from other sites.
The message format distinguishes between information acquired from external sources and information acquired from routers interior to the site, so there is no ambiguity about the source or reliability of routes.
It has too much overhead of sending LSP( label switched path )‘s but is gradually becoming popular.