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?


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.