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
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Introduction
- Introduction
- What you should know
- Tools and software
- POTS failure
- Copper Ethernet failure
- Fiber interface failure
- Switching loop
- Duplicate addressing
- DNS/IP addressing issues
- Rogue DHCP
- Failed routes/routing loop
- Port already in use, netstat
- Test service connectivity, telnet/wireshark
- Intermittent service
- NMS
- Probes
- Next steps
