CompTIA Network+ (N10-009) — Question 413

A network manager connects two switches together and uses two connecting links. Which of the following configurations will prevent Layer 2 loops?

Answer options

• A. 802.1Q tagging
• B. Full duplex
• C. Link aggregation
• D. QoS

Correct answer: C

Explanation

Link aggregation allows multiple physical links to be combined into a single logical link, which helps prevent Layer 2 loops by managing traffic more effectively. The other options, such as 802.1Q tagging, full duplex, and QoS, do not address loop prevention specifically and thus are not effective in this scenario.