Which three tools are used for ongoing monitoring and maintenance of a voice and video environment? (Choose three.)

Which three tools are used for ongoing monitoring and maintenance of a voice and video environment? (Choose three.)
A . flow-based analysis to measure bandwidth mix of applications and their flows
B. call management analysis to identify network convergence-related failures
C. call management analysis to identify CAC failures and call quality issues
D. active monitoring via synthetic probes to measure loss, latency, and jitter
E. passive monitoring via synthetic probes to measure loss, latency, and jitter
F. flow-based analysis with PTP time-stamping to measure loss, latency, and jitter

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Answer: A,C,D