Why do large OSPF networks use a hierarchical design? (Choose three.)

The correct answer is B. to reduce routing overhead C. to speed up convergence D. to confine network instability to single areas of the network. OSPF implements a two-tier hierarchical routing model that uses a core or backbone tier known as area zero (0). Attached to that backbone via area border routers (ABRs) are a number of secondary tier areas. The hierarchical approach is used to achieve the following: Rapid converg

Submitted by kwame.gh· Mar 5, 2026IP Connectivity

Question

Why do large OSPF networks use a hierarchical design? (Choose three.)

Options

Ato decrease latency by increasing bandwidth
Bto reduce routing overhead
Cto speed up convergence
Dto confine network instability to single areas of the network
Eto reduce the complexity of router configuration
Fto lower costs by replacing routers with distribution layer switches

How the community answered

(40 responses)

A
8% (3)
B
73% (29)
E
15% (6)
F
5% (2)

Explanation

OSPF implements a two-tier hierarchical routing model that uses a core or backbone tier known as area zero (0). Attached to that backbone via area border routers (ABRs) are a number of secondary tier areas. The hierarchical approach is used to achieve the following: Rapid convergence because of link and/or switch failures Deterministic traffic recovery Scalable and manageable routing hierarchy, reduced routing overhead.

Topics

#OSPF#hierarchical design#area design#convergence

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