You want to enhance the security within the LAN and prevent VLAN hopping. What two steps canbe taken to help prevent this？（）
- A、Enable BPD guard
- B、Disable CDP on ports where it is not necessary
- C、Place unused ports in a common unrouted VLAN
- D、Prevent automatic trunk configuration
- E、Implement port security
正确答案:C,D
答案解析:有
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