Quick Answer
Network Troubleshooting questions on this certification test your ability to deploy and manage network troubleshooting concepts in scenario-based situations.
Use this page to practise Network Troubleshooting questions for this certification. Focus on how the exam tests network troubleshooting in scenario format — understanding the why behind each answer builds more durable knowledge than memorising options.
What the exam tests
Common exam traps
Troubleshooting Methodology
Objective 5.1 · Network Troubleshooting
Troubleshoot: Cable and Physical Layer
Objective 5.2 · Network Troubleshooting
Troubleshoot: Network Connectivity
Objective 5.3 · Network Troubleshooting
Troubleshoot: Wireless Issues
Objective 5.4 · Network Troubleshooting
Troubleshoot: Security and Policy
Objective 5.5 · Network Troubleshooting
CLI Tools: ping, tracert, nslookup, netstat
Objective 5.6 · Network Troubleshooting
Troubleshoot Physical Layer Issues
Objective 5.2 · Network Troubleshooting
Cable Testing Tools: TDR and OTDR
Objective 5.2 · Network Troubleshooting
Interface Error Types: CRC, Runts, Giants
Objective 5.2 · Network Troubleshooting
Duplex Mismatch Troubleshooting
Objective 5.2 · Network Troubleshooting
VLAN Mismatch and Native VLAN Issues
Objective 5.2 · Network Troubleshooting
STP Troubleshooting: Loops and Convergence
Objective 5.2 · Network Troubleshooting
Routing Table Troubleshooting
Objective 5.3 · Network Troubleshooting
Default Gateway Configuration Issues
Objective 5.3 · Network Troubleshooting
IP Address Conflict Resolution
Objective 5.3 · Network Troubleshooting
DNS Troubleshooting: nslookup and dig
Objective 5.3 · Network Troubleshooting
DHCP Troubleshooting
Objective 5.3 · Network Troubleshooting
ARP Table Troubleshooting
Objective 5.3 · Network Troubleshooting
NAT/PAT Troubleshooting
Objective 5.3 · Network Troubleshooting
Firewall Rule Troubleshooting
Objective 5.5 · Network Troubleshooting
VPN Connectivity Troubleshooting
Objective 5.5 · Network Troubleshooting
Wireless Signal Strength and Coverage Issues
Objective 5.4 · Network Troubleshooting
Wireless Channel Interference
Objective 5.4 · Network Troubleshooting
Certificate Error Troubleshooting
Objective 5.5 · Network Troubleshooting
Bandwidth Saturation Troubleshooting
Objective 5.3 · Network Troubleshooting
Latency and Jitter Troubleshooting
Objective 5.3 · Network Troubleshooting
IPv6 Connectivity Troubleshooting
Objective 5.3 · Network Troubleshooting
Packet Capture with Wireshark
Objective 5.6 · Network Troubleshooting
Switch Show Commands
Objective 5.6 · Network Troubleshooting
Router Show Commands
Objective 5.6 · Network Troubleshooting
ip route and ip addr Commands
Objective 5.6 · Network Troubleshooting
tcpdump Packet Analysis
Objective 5.6 · Network Troubleshooting
Wireless Spectrum Analyzer
Objective 5.4 · Network Troubleshooting
Cloud Connectivity Troubleshooting
Objective 5.3 · Network Troubleshooting
Free N10-009 practice questions with full explanations. Test what you learn chapter by chapter.
N10-009 Practice Questions