OSPF-6

Question 1

How does OSPF minimize routing update traffic?

Answer 1

A: By using link-state advertisements (LSAs) and only sending updates when changes occur.

Explanation: OSPF doesn’t flood the entire routing table but shares only relevant topology changes using LSAs.

Question 2

Does OSPF support manual route summarization?

Answer 2

A: Yes.

Explanation: OSPF allows manual summarization at area boundaries or ASBRs, reducing routing table size and improving stability.

Question 3

Can OSPF be used in multi-vendor environments?

Answer 3

A: Yes, it is an open standard.

Explanation: OSPF is an IETF standard protocol, making it interoperable across different vendor platforms.

Question 4

What feature does OSPF support to ensure secure neighbor relationships?

Answer 4

A: Peer authentication.

Explanation: OSPF supports plain-text and MD5 authentication to validate OSPF messages between routers.

Question 5

What are three key benefits of OSPF hierarchical design?

Answer 5

A:

Decreases routing overhead
Speeds up convergence
Confines network instability to single areas

Explanation:

• Decreased overhead: LSAs are limited to their own areas, - -reducing CPU and memory usage.
• Faster convergence: Smaller areas allow quicker SPF calculations.
• Stability containment: Flapping links or route changes in one area don’t affect the entire network.