Nokia Exam 4A0-112 Topic 2 Question 2 Discussion

Actual exam question for Nokia's 4A0-112 exam

Question #: 2
Topic #: 2

When using IS-IS in native mode for routing in a dual-stack IPv4/IPv6 environment, which of the following statements is FALSE?

AAll links are assumed to be IPv4- and IPv6-capable.

BThe same topology information is used to calculate the shortest path tree for both IPv4 and IPv6.

CIn a multi-area environment, the SPF algorithm needs to be run four times on each L1/L2 router.

DIt may lead to traffic black-holing if not properly designed.

Show Suggested Answer

Suggested Answer: C

In a dual-stack IPv4/IPv6 IS-IS environment, the SPF (Shortest Path First) algorithm is only run once per router for each protocol (IPv4 or IPv6). The topology is shared, but the SPF calculations for IPv4 and IPv6 are separate. This means that the SPF algorithm will run twice (once for IPv4 and once for IPv6) for each L1/L2 router, not four times.

by Gregoria at Jan 25, 2025, 06:06 PM

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