Which statement is correct about multiarea OSPF?
- OSPF can consolidate a fragmented OSPF area into one large area.
- Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers.
- All routers are in one area called the backbone area (area 0).
- OSPF multiarea increases the frequency of SPF calculation.
Explanation: A company with one large autonomous system or AS can be divided into smaller areas. When this occurs and the OSPF routing protocol is implemented, the design is called multi-area OSPF. Multi-area OSPF decreases the frequency of the SPF calculation, thus lightening the load on the router. In a single area OSPF design, all the routers are located in area 0 or the backbone area.
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