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