Computer Networking · Beginner level

Beginner level · Module 3 of 5 · 10 guided hours

Basic Network Troubleshooting

Find and fix common connection problems with a simple, ordered method.

Learning objectives

  • Troubleshoot step by step from the device outwards
  • Use ping, ipconfig and nslookup
  • Recognise common faults and fixes

Topics

  • the ping ladder
  • ipconfig
  • APIPA addresses
  • DNS problems
  • cables and lights
  • IP conflicts

Lessons

  1. Lesson 1 The Ping Ladder

    Test connectivity step by step from your own device to the internet.

    pingloopbackdefault gatewayinternet address test

  2. Lesson 2 Reading IP Configuration and DNS

    Use ipconfig and nslookup to find configuration problems.

    ipconfig /all169.254 addressesnslookupflushing DNS

  3. Lesson 3 Common Faults and Fixes

    Recognise frequent problems and fix them safely.

    link lightsIP conflictsISP outagesfault log

Practical activity

Diagnose five faults planted in the lab (unplugged cable, wrong Wi-Fi, DHCP off, DNS wrong, ISP link down) using the ping ladder.

Expected outcomes

  • Methodical troubleshooting
  • Faster fixes for common problems

Assessment

Fault-finding exercise scored on correct diagnosis and method.

Free taster lesson Basic Troubleshooting: Ping, DNS & Connectivity Checks Read a free self-study lesson on this topic in the Free Course Library.

Taught live by an instructor — online or in person. Free course lessons are for self-study and do not lead to a certificate — see registration options.