A company's VoIP calls are experiencing intermittent quality issues. The network technician has been tasked with identifying the cause of these issues. Which of the following metrics would be the MOST useful to determine the source of the problem?
Check the network utilization on VoIP server ports
Review the error rates on the switches connecting VoIP phones
Analyze the available bandwidth during peak business hours
Measure the average latency over time during VoIP calls