CompTIA Network+ (N10-008) — Question 214

Which of the following is used to elect an STP root?

Answer options

• A. A bridge ID
• B. A bridge protocol data unit
• C. Interface port priority
• D. A switch's root port

Correct answer: A

Explanation

The correct answer is A, as the bridge ID is the unique identifier used by STP to elect the root bridge. Options B, C, and D refer to other STP concepts but do not play a direct role in the election of the root bridge.