Which statements describe the routing protocol OSPF? (Choose three)
A . It supports VLS
C . It is used to route between autonomous systems.
D . It confines network instability to one area of the network.
E . It increases routing overhead on the network.
F . It allows extensive control of routing updates.
G . It is simpler to configure than RIP v2.
Answer: ACE
Explanation:
The OSPF protocol is based on link-state technology, which is a departure from the Bellman-Ford vector based algorithms used in traditional Internet routing protocols such as RIP. OSPF has introduced new concepts such as authentication of routing updates, Variable Length Subnet
Masks (VLSM), route summarization, and so forth.
OSPF uses flooding to exchange link-state updates between routers. Any change in routing information is flooded to all routers in the network. Areas are introduced to put a boundary on the explosion of link-state updates. Flooding and calculation of the Dijkstra algorithm on a router is limited to changes within an area.
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