N10-009 Domain 5: Network Troubleshooting

Users get wrong IP subnet after office move. Cause?

Multiple choice — select one answer

Answer choices

  1. a. Mis-scoped DHCP or relay pointing to old server
  2. b. Negotiated speed/duplex and cable category
  3. c. ICMP/time-exceeded filtered — not always outage
  4. d. Implement QoS marking/queuing for voice VLAN

Architectural breakdown & explanation

DHCP scope/relay errors assign wrong networks.

Correct answer(s): a. Mis-scoped DHCP or relay pointing to old server

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

Official documentation & study links

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