IT Support Specialist: Mastering Computer Networking & Troubleshooting
https://www.scribd.com/document/988095642/How-to-Become-an-IT-Support-Specialist-Mastering-Computer-Troubleshooting-and-Networking-Skills-213056
IT Assistance Professional: Learning Computer Networking & Troubleshooting Introduction Photo this: it's 3 AM and your company