Which three of the following network features are methods used to achieve high availability? ()
- A、 Spanning Tree Protocol (STP)
- B、 Delay reduction
- C、 Hot Standby Routing Protocol (HSRP)
- D、 Dynamic routing protocols
- E、 Quality of Service (QoS)
- F、 Jitter management
正确答案:A,C,D
答案解析:有

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