What are three advantages for designing a network with multi area OSPF?

What are three advantages for designing a network with multi area OSPF?

Advantages of Multiarea OSPF: Smaller routing tables – Fewer routing table entries as network addresses can be summarized between areas. Reduced link-state update overhead. Reduced frequency of SPF calculations.

When verifying OSPF virtual link problems which is an important item to check on the two transit OSPF routers?

When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers? The OSPF router IDs of the two transit OSPF routers are used to form the virtual link (with the area area-id virtual-link neighbor-router-id command) so it is an important item to check -> B is correct.

What is the importance of virtual link?

You can also use virtual links to connect two parts of a partitioned backbone through a non-backbone area. The area through which you configure the virtual link, known as a transit area, must have full routing information. The transit area cannot be a stub area.

How does virtual link work in OSPF autonomous system?

All areas in an OSPF autonomous system must be physically connected to the backbone area (area 0). In some cases where this physical connection is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can also use virtual links to connect two parts of a partitioned backbone through a non-backbone area.

Can a link belong to more than one OSPF area?

Both sides of any link always belong to the same OSPF area. An autonomous system boundary router (ASBR) advertises external destinations throughout the OSPF autonomous system. External routes are the routes redistributed into OSPF from any other protocol.

What are the benefits of creating OSPF areas?

The main benefit of creating areas is a reduction in the number of routes to propagate – by the filtering and the summarization of routes. Each OSPF network that is divided into different areas must follow these rules: A backbone area – which combines a set of independent areas into a single domain – must exist.

Can a virtual link be used in a non-backbone area?

In some cases, where this is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can also use virtual links to connect two parts of a partitioned backbone through a non-backbone area. The area through which you configure the virtual link, known as a transit area, must have full routing information.