Which three of the following protocols will be forwarded to a host specified by the ip helper - address interface configuration command if the configuration has not been modified by the ip forward - protocol udp global con figuration command?（）
- A、BOOTP
- B、TFTP
- C、ARP
- D、DNS
- E、proxy - ARP
- F、FTP
正确答案:A,B,D
答案解析:有
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