Routers can send hello messages in three HSRP states. Which ones are they？（）
- A、 Standby
- B、 Learn
- C、 Listen
- D、 Speak
- E、 Active
正确答案:A,D,E
答案解析:有
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Routers can send hello messages in three HSRP states. Which ones are they？（）
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