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Question 45 - JN0-280 discussion

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Which statement is correct about areas in OSPF?

A.

An OSPF area is used to segment Layer 2 broadcast domains.

Answers
A.

An OSPF area is used to segment Layer 2 broadcast domains.

B.

OSPF areas are used to isolate the effects of a broadcast storm.

Answers
B.

OSPF areas are used to isolate the effects of a broadcast storm.

C.

OSPF areas are used to reduce the size of the link-state database.

Answers
C.

OSPF areas are used to reduce the size of the link-state database.

D.

An OSPF area is used to signify the autonomous system to which each device belongs.

Answers
D.

An OSPF area is used to signify the autonomous system to which each device belongs.

Suggested answer: C

Explanation:

In OSPF (Open Shortest Path First), areas are used to segment a network into smaller, more manageable pieces to improve scalability. By dividing a network into areas, OSPF can reduce the size of the link-state database (LSDB), which helps routers process updates more efficiently.

Step-by-Step Breakdown:

Purpose of OSPF Areas:

OSPF areas allow for hierarchical routing within the OSPF domain. Routers in the same area have identical LSDBs, but routers in different areas do not exchange full link-state information. Instead, they exchange summarized routes, which reduces the LSDB size and CPU/memory usage.

Benefits:

Reducing the LSDB size improves scalability and ensures faster convergence in larger networks. Area 0 is the backbone area, and all other areas must connect to it, forming a hierarchical structure.

Juniper

Reference:

OSPF Configuration: Areas in OSPF are configured to optimize network performance by limiting the scope of link-state advertisements (LSAs) to within an area.

asked 10/10/2024
John Ordonez
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