Which two statements about NTP version 4 are true？（）
- A、It supports fast synchronization at starting and before network failures
- B、It supports automatic server discovery
- C、It uses a fixed-point arithmetion
- D、It supports the "nanokernel" kernel implementation
- E、It does not support Public-Key Cryptography
正确答案:B,D
答案解析:有
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