OSPF Areas and Hierarchy

Question 1

What is the purpose of OSPF areas?

Answer 1

To reduce routing overhead and improve scalability

Question 2

What is Area 0 in OSPF?

Answer 2

The Backbone Area, which all other areas must connect to

Question 3

What is an ABR (Area Border Router)?

Answer 3

A router that connects different OSPF areas

Question 4

What is an ASBR (Autonomous System Boundary Router)?

Answer 4

A router that connects OSPF to external routing domains

Question 5

What is an OSPF stub area?

Answer 5

An area that does not accept external routes from ASBRs

Question 6

What are the types of OSPF stub areas?

Answer 6

Stub, Totally Stubby, Not-So-Stubby Area (NSSA), and Totally NSSA