CCNA Routing and Switching (legacy) — Question 182

Which three elements must be used when you configure a router interface for VLAN trunking? (Choose three.)

Answer options

• A. one physical interface for each subinterface.
• B. one IP network or subnetwork for each subinterface.
• C. a management domain for each subinterface.
• D. subinterface encapsulation identifiers that match VLAN tags.
• E. one subinterface per VLAN.
• F. subinterface numbering that matches VLAN tags. BDE

Correct answer:

Explanation

The correct answers B, D, and E are essential for VLAN trunking configuration. Each subinterface must have its own IP network or subnetwork (B), encapsulation identifiers that align with VLAN tags (D), and one subinterface is needed for each VLAN (E). Options A, C, and F are not necessary for the basic configuration of VLAN trunking.