Designing Cisco Enterprise Networks (ENSLD) — Question 37

An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same IS-IS router levels for each protocol per interface. Which IS-IS design is required?

Answer options

• A. multi topology without enabling transition feature
• B. multi topology with transition feature enabled
• C. single topology without enabling transition feature
• D. single topology with transition feature enabled

Correct answer: C

Explanation

The correct answer is C because a single topology without the transition feature allows both IPv4 and IPv6 to coexist without introducing complexity. The other options involve multi-topology designs or enabling transition features, which are unnecessary for matching topologies and can complicate the implementation.