CCNA Routing and Switching (legacy) — Question 60

Which statement about spanning-tree root-bridge election is true?

Answer options

• A. Every root bridge must reside on the same root switch.
• B. Every VLAN must use the same root bridge.
• C. It is always performed automatically.
• D. Each VLAN must have its own root bridge.

Correct answer: D

Explanation

The correct answer is D because each VLAN can operate independently within the spanning-tree topology, thus requiring its own root bridge for optimal performance. Options A and B are incorrect as they imply limitations that do not apply to VLAN structures. Option C is misleading, as while the process is automated, it can also be influenced by manual configuration.