多选题Which of the following features would BEST be used to optimize real-time voice and video chat?（）(Select TWO)ALoad balancingBCaching enginesCQosDFault tolerance systemsETraffic shaping
题目
多选题
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