Which of the following features would BEST be used to optimize real-time voice and video chat?（）(Select TWO)A、Load balancingB、Caching enginesC、QosD、Fault tolerance systemsE、Traffic shaping
Which of the following features would BEST be used to optimize real-time voice and video chat?（）(Select TWO)
- A、Load balancing
- B、Caching engines
- C、Qos
- D、Fault tolerance systems
- E、Traffic shaping
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