Select a recent or frequent technology problem you have had at school, work, or home. Explain how you would solve the problem following the troubleshooting methodology. Include the problem description and symptoms, resources searched, theories tested, problem resolution, and how you would document the issue and prevent it from recurring.
Test Internet connectivity:
Verify a physical connection:
Wired: Check for connectivity lights on the network adapter and switch or router.
Wireless: Check for connectivity through the user interface.
Verify ip address settings.
Windows: Use ipconfig.
macOS: Use Network Utility, System Preferences / Network, or ifconfig.
Linux: Use Network Configuration, System Settings / Networking, or ifconfig.
Review Ping/Host. Verify local and remote connectivity using ping.
Ping your local IP address.
Ping your local default gateway address.
Ping an Internet host such as 8.8.8.8.
Review Nslookup. Verify name resolution using nslookup and an Internet host name, such as en.wikiversity.org.
Windows: Boot into Safe Mode and/or the Recovery Console. View available options but do not make any changes. Restart the system normally when you are finished.
macOS: Boot into single-user mode. View available options but do not make any changes. Restart the system normally when you are finished.
Linux: Boot into single-user mode. View available options but do not make any changes. Restart the system normally when you are finished.
Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms. Determining the most likely cause is a process of elimination—eliminating potential causes of a problem. Finally, troubleshooting requires confirmation that the solution restores the product or process to its working state.[2]
A disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.[4]
ESD (Electrostatic Discharge)
The sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown.[5]
safe mode
A diagnostic mode of a computer operating system. In Windows, safe mode only allows essential system programs and services to start up at boot. It is widely used for removing rogue security software.[6]
single user mode
A mode in which a multiuser computer operating system boots into a single superuser, common on Unix-like systems including macOS and Linux.[7]