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Network Troubleshooting Guide
Network issues can affect both wired and wireless connections, requiring systematic diagnosis to identify and resolve connectivity problems.
Wireless Network Issues
| Symptom | Common Causes | Resolution Steps |
|---|---|---|
| Intermittent Connectivity | • Signal interference • Channel congestion • Distance issues • Hardware problems | 1. Check signal strength 2. Analyze WiFi channels 3. Relocate access points 4. Update firmware |
| External Interference | • Microwave ovens • Bluetooth devices • Other networks • Physical obstacles | 1. Conduct site survey 2. Change channels 3. Use 5GHz band 4. Adjust AP placement |
| Slow Speeds | • Network congestion • Outdated equipment • Signal weakness • Bandwidth limits | 1. Speed test analysis 2. Check device specs 3. Monitor bandwidth usage 4. Upgrade equipment |
Wired Network Problems
| Issue | Indicators | Troubleshooting Steps |
|---|---|---|
| Port Flapping | • Link status changes • Intermittent connection • Error logs • Network instability | 1. Check cable integrity 2. Verify port settings 3. Test different ports 4. Replace equipment |
| Limited Connectivity | • DHCP issues • DNS problems • Gateway errors • Subnet conflicts | 1. Verify IP configuration 2. Test DNS resolution 3. Check gateway status 4. Review DHCP scope |
| High Latency | • Slow response times • Packet loss • Network congestion • Route issues | 1. Run ping tests 2. Trace routes 3. Monitor bandwidth 4. Check network load |
VoIP and Quality of Service
| Problem | Symptoms | Solutions |
|---|---|---|
| Poor VoIP Quality | • Echo • Choppy audio • Delayed speech • Call drops | 1. Implement QoS 2. Check bandwidth 3. Monitor jitter 4. Optimize routing |
| Jitter | • Packet delay variation • Inconsistent delivery • Audio quality issues • Video stuttering | 1. Configure buffers 2. Prioritize traffic 3. Check network load 4. Upgrade infrastructure |
Diagnostic Tools:
• Network analyzers
• Ping and traceroute
• Bandwidth monitors
• WiFi analyzers
• Cable testers
Best Practices:
• Document network topology
• Maintain updated firmware
• Regular performance monitoring
• Implement security measures
• Schedule maintenance windows