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LinkedIn Learning

Troubleshooting Network Connectivity

via LinkedIn Learning

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Overview

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Learn how to diagnose the source of network connectivity problems by troubleshooting each layer of a network, including physical media, DNS issues, Wi-Fi interference, and more.

Syllabus

Introduction
  • Introduction
  • What you should know
  • Tools and software
1. Physical Layer Troubleshooting
  • POTS failure
  • Copper Ethernet failure
  • Fiber interface failure
2. Data Link and Network Layer Troubleshooting
  • Switching loop
  • Duplicate addressing
  • DNS/IP addressing issues
  • Rogue DHCP
  • Failed routes/routing loop
3. Transport Layer Troubleshooting
  • Port already in use, netstat
  • Test service connectivity, telnet/wireshark
4. Wi-Fi Troubleshooting
  • Intermittent service
5. Proactive Troubleshooting
  • NMS
  • Probes
Conclusion
  • Next steps

Taught by

Greg Sowell

Reviews

4.5 rating at LinkedIn Learning based on 146 ratings

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