Exam 400-007 topic 1 question 191 discussion

A. Check for high channel utilization. C. Check for latency over wireless.

AC. voice traffic cares about jitters and latency. high channel utilization connects to jitters. latency over wireless is obvious. Not B because roaming affects only when devices move between access points.

For reliable voice support over wireless, we need low-latency and seamless roaming.

A&B. C is a bit tricky because latency matters but the keyword is "latency" not "high latency". There is always latency but high latency is a problem.

Voice enemies: Delay and Latency. High utilization is bad for all kind of traffic, not only voice, since voice should be prioritized, it shouldn't matter. Coverage is just simply NO service... all apps need service, no specific problem for voice. Power changes... wireless issues, generic wireless TBS.

For voice: good radio coverage, 20% cell overlap. Low latency, jitter, packet loss.

in my opinion there are three options correct: A (channel utilization), B (roaming delay can cause line drop), D (actually the requirement is minimum poert -67dBm but uniform coverage could mean the same requirement..). Which one of three do we ignore? Peraphs roaming delay is measurable only in post deployment and not in an initial assessment?

Poor call quality – Red/Yellow QoS – TSM Report – High Channel Utilization – High Roaming delay https://www.cisco.com/c/en/us/td/docs/wireless/technology/vowlan/troubleshooting/vowlan_troubleshoot.pdf

ABC all correct

AB seems logical

A) It can cause jitter B) It can cause line drop C) Should not be high latency within same network. Little latency still can talk but slower. D) No reason to get voice coverage if no wifi data coverage. That's another requirement for greater coverage. E) Seldom to care it.

A, B - IS SCORRECT

High channel utilization can lead to packet loss and delay, which can impact the quality of voice calls.

A & B https://community.cisco.com/t5/wireless/channel-utilization/td-p/2716667