Uploaded January 2026 | Updated September 2026, 3 days ago

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This is an A+ PBQ-style troubleshooting lab.

Scenario:
A user reports that their PC cannot reach the internet, while other machines work normally.

This lab focuses on exam-style troubleshooting under time pressure, not theory memorisation.
This A+ PBQ-style scenario demonstrates practical network troubleshooting. We'll use the command prompt and ipconfig to diagnose why a single machine has no internet access while others function correctly. The analysis involves checking IP configurations and using the ping command to verify connectivity to the default gateway, a common step in resolving such issues.

In this lab, you troubleshoot the issue using Cisco Packet Tracer and identify why the PC cannot ping its default gateway, even though the IP configuration looks correct.

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🧪 Download this lab (before and after Packet Tracer files):
101labs.net/comptia-a-pbq-lab

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