routing protocols : OSPF Hierarchy - Multiple areas

The video tutorial explains the division of large autonomous systems into smaller areas, focusing on OSPF and RIP protocols. It highlights the benefits of breaking OSPF into multiple areas, such as reducing routing table size and improving resource efficiency. The tutorial describes different router types within OSPF, including area border routers and backbone routers, and discusses the advantages of multiple areas, like hiding link changes from other areas. It also covers route summarization and its role in maintaining efficient network connectivity.

What is one of the main benefits of dividing an autonomous system into smaller areas?

• Increased complexity of routing tables

• Reduction of link state advertisement flooding

• More routers in a single area

• Increased administrative overhead

What is the primary function of an area border router in OSPF?

• To act as a backup router

• To connect multiple areas within an OSPF autonomous system

• To manage interfaces within a single area

• To connect OSPF to external autonomous systems

How do autonomous system border routers differ from area border routers?

• They do not participate in route summarization

• They are only part of the backbone area

• They manage internal routing within a single area

• They connect OSPF to external systems

What is a key advantage of configuring stub areas in OSPF?

• More frequent link state advertisements

• Reduced need to rerun the SPF algorithm

• Increased routing table size

• Increased visibility of network changes

How do area border routers help manage summary routes in OSPF?

• By increasing the number of link state advertisements

• By blocking summary routes from entering certain areas

• By propagating all routes to every area

• By connecting OSPF to external systems