JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2021) — Question 5

You must configure an MX Series device to receive and forward a mixture of single-tag and dual-tag frames on interface xe-0/0/0.
In this scenario what will accomplish goal?

Answer options

• A. xe-0/0/0 { flexible-vlan-tagging; }
• B. xe-0/0/0 { stacked-vlan-tagging; }
• C. xe-0/0/0 { vlan-vci-tagging; }
• D. xe-0/0/0 { vlan-tagging;

Correct answer: A

Explanation

The correct answer is A, as flexible VLAN tagging allows the interface to handle both single-tag and dual-tag frames. Option B, stacked-vlan-tagging, is specifically for handling stacked VLANs, while options C and D do not support the mixed frame types required in this scenario.