Alcatel-Lucent NRS I – Layer 2 Switching and Spanning Tree — Question 15

Which of the following prefix-lists is the most specific match for prefixes 192.168.64.1/20 and
192.168.32.5/19?

Answer options

• A. Prefix 192.168.0.0/17 longer.
• B. Prefix 192.168.0.0/19 longer.
• C. Prefix 192.168.96.0/19 longer.
• D. Prefix 192.168.0.0/18 longer.

Correct answer: A

Explanation

The correct answer is A, as the prefix 192.168.0.0/17 encompasses both 192.168.64.1/20 and 192.168.32.5/19, providing the most specific match. Options B, C, and D are less specific as they cover broader ranges or do not include both prefixes.