Cisco 300-510 Exam - Topic 5 Question 121 Discussion

Actual exam question for Cisco's 300-510 exam

Question #: 121
Topic #: 5

Which difference must an engineer consider when choosing whether to implement OSPF or IS-IS as the routing protocol on the network?

AThe OSPF DR election process is deterministic, and the IS-IS DS election process is not deterministic.

BTo support fast convergence. OSPF uses the LSA arrival timer and IS-IS uses the PRC-interval timer.

CIS-IS supports ordinary, stub, totally-stub. and NSSA areas, but OSPF supports only stub areas.

DIS-IS links are associated with either a Level 1 area or a Level 2 area at one time, but OSPF links are associated with multiple areas at one time.

Show Suggested Answer

Suggested Answer: B

by Vicente at Apr 01, 2026, 05:53 PM

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3 days ago

I practiced a question similar to this, and I recall that OSPF has different area types, but I can't remember if IS-IS has more options or not.

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8 days ago

I think I remember something about OSPF's deterministic DR election, but I'm not entirely sure how that compares to IS-IS.

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