You are the network administrator of a small Layer 2 network with 50 users. Lately， users have beencomplaining that the network is very slow. While troubleshooting， you notice that the CAM table of yourswitch is full， although it supports up to 12， 000 MAC addresses. How can you solve this issue and preventit from happening in the future？（）

• A、Upgrade the switches
• B、Configure BPDU guard
• C、Configure VLAN access lists
• D、Configure port security
• E、Configure Dynamic ARP inspection