N10-009 - Network Troubleshooting - Section 5.4
Troubleshoot common wireless connectivity and general networking issues, including DHCP, DNS, addressing, interference, and routing problems.
Troubleshoot general service failures - DHCP exhaustion or a rogue server, DNS misconfiguration, duplicate or APIPA addressing, incorrect default gateway or subnet mask, and routing-loop or asymmetric-path symptoms. Diagnose wireless-specific faults: channel overlap and interference, insufficient signal strength or coverage, band steering, and authentication or encryption mismatches between client and access point.
DHCP/DNS issuesAPIPA and addressing errorsWireless interferenceSignal strength and coverageDefault gateway misconfiguration
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