Your network is suffering from regular outages. After troubleshooting， you learn that the transmit lead of afiber uplink was damaged. Which two features can prevent the same issues in the future？（）
- A、root guard
- B、loop guard
- C、BPDU guard
- D、UDLD
- E、BPDU skew detection
正确答案:B,D
答案解析:有
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