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N10-009 Domain 5: Network Troubleshooting

VoIP choppy on congested link. Mitigate?

Multiple choice — select one answer

Answer choices

  1. a. ICMP/time-exceeded filtered — not always outage
  2. b. Implement QoS marking/queuing for voice VLAN
  3. c. Measure path with traceroute/MTR and check link utilization
  4. d. Identify conflicting static/DHCP leases and reconcile

Architectural breakdown & explanation

Priority queuing protects real-time traffic.

Correct answer(s): b. Implement QoS marking/queuing for voice VLAN

Exam domain: Domain 5: Network Troubleshooting (22% weight on the official guide).

Official documentation & study links

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