Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 45

Egress PE NAT is being used via a single centralized router to provide Internet access to L3VPN customers.
Which description of the NAT operation is true?

Answer options

• A. The NAT table contains a field to identify the inside VRF of a translation.
• B. Multiple address pools are needed for the same L3VPN because each site has a separate NAT.
• C. The different L3VPNs using the Internet access must not have IP overlaps internally.
• D. Users in different VRFs cannot share the same outside global IP address.

Correct answer: A

Explanation

The correct answer is A because the NAT table needs to keep track of which inside VRF each translation belongs to for proper routing. Option B is incorrect because a single NAT can handle multiple sites without requiring separate pools. Option C is false since overlapping IPs can be managed with proper NAT configurations, and option D is misleading as users in different VRFs can share the same outside global IP if properly configured.