Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 398

An engineer working for telecommunication company needs to secure the LAN network using a prefix list.
Which best practice should the engineer follow when he implements a prefix list?

Answer options

• A. An engineer must identify the prefix list with a number only.
• B. The final entry in a prefix list must be /32.
• C. An engineer must include only the prefixes for which he needs to log activity.
• D. An engineer must use nonsequential sequence numbers in the prefix list so that he can insert additional entries later.

Correct answer: D

Explanation

Using nonsequential sequence numbers allows the engineer to easily add new entries into the prefix list without needing to rearrange existing entries. The other options either impose unnecessary restrictions or do not align with best practices for effective prefix list management.