CompTIA Network+ (N10-008) — Question 313

A network engineer is investigating issues on a Layer 2 switch. The department typically shares a switchport during meetings for presentations, but after the first user shares, no other users can connect. Which of the following is MOST likely related to this issue?

Answer options

• A. Spanning Tree Protocol is enabled on the switch.
• B. VLAN trunking is enabled on the switch.
• C. Port security is configured on the switch.
• D. Dynamic ARP inspection is configured on the switch.

Correct answer: C

Explanation

The correct answer is C, as port security restricts the number of MAC addresses that can be learned on a switchport. If one user connects and the port's limit is reached, no additional users can connect. Options A, B, and D do not directly limit the number of devices that can connect to a switchport in this manner.