Designing Cisco Enterprise Networks (ENSLD) — Question 137

A customer requests a VPN solution to connect multiple sites with the company headquarters. All the sites use the same IP subnet. The engineer plans to use
VPLS. Which solution must the engineer include in the design?

Answer options

• A. different VLANs on each site
• B. address translation to hide overlapping subnets
• C. 802.1Q connectivity on the LAN side of the CE
• D. route exchange with the service provider

Correct answer: C

Explanation

The correct answer is C because 802.1Q encapsulation is necessary to maintain VLAN information across the VPLS network, enabling proper traffic segmentation. Option A is incorrect as using different VLANs alone does not resolve the issue of overlapping subnets. Option B is also wrong since address translation does not apply in this scenario where VPLS is used. Lastly, option D does not directly address the need for VLAN tagging in a VPLS setup.