Jensen IT Notes
I’m Jensen. I work in school IT support in the Greater Toronto Area. This site is where I document the problems I run into, the labs I build, and what I’m learning about networking and system administration.
Experience
My current role is in school IT support. Before that, I worked on onsite systems installation and troubleshooting.
Current role
Current
Previous experience
June 2026 to July 2026
Projects
Four repositories covering Windows domains, Microsoft 365 administration, Packet Tracer, and support tickets.
I built this lab to practise the Windows domain tasks that often sit behind account, access, and desktop support tickets.
Proxmox / Windows Server / AD DS
I use a test tenant to work through account and access tasks that are difficult to reproduce in a local homelab.
Microsoft 365 / Entra ID / Identity
I built this series to move from reading network concepts to configuring and checking them in Cisco Packet Tracer.
Packet Tracer / VLANs / Routing
I started this repository to turn support cases into notes I can search and reuse instead of relying on memory.
Ticket notes / Windows / Troubleshooting
Certifications
These certifications gave me a base for desktop support, networking, and cloud terminology.
Studying now
I am working through switching, routing, VLANs, subnetting, and network troubleshooting, then rebuilding the concepts in Packet Tracer.
Latest notes
Short guides on Windows, hardware, printers, and networking. Some started as support cases; others came from lab work or certification study.
How a small network assigns IP addresses, leases, gateways, and DNS settings through DHCP.
A step-by-step way to isolate IP, gateway, DNS, Wi-Fi, Ethernet, and upstream network faults.
How A+ and Network+ differ, where each one helped me, and how to connect certification study to support work.
Windows, printer, account, driver, and connectivity problems I have worked through or reproduced in a lab.
Browse notes
Notes from Packet Tracer, Proxmox, and network troubleshooting, including VLANs, DHCP, DNS, and routing.
Browse notes
Microsoft 365 and Entra ID lab notes covering accounts, MFA, Conditional Access, and access checks.
Browse notes
What I am studying, how I document support work, and notes for building an IT career in Canada.
Browse notes
PC hardware, storage, drivers, ports, adapters, and the tools used to diagnose common device problems.
Browse notes
Quizzes
Original troubleshooting scenarios based on the subjects covered in the notes. They are not certification exam questions.
Computer hardware basics for beginner IT support
Ten PC repair and upgrade scenarios covering storage, memory, cooling, power, ports, and safe replacement decisions.
Start quiz
Basic networking concepts useful for A+ and beginner IT support
Ten connectivity cases involving IP settings, DHCP, DNS, gateways, APIPA, Wi-Fi, and command output.
Start quiz
Basic Windows troubleshooting commands
Eight situations where you need to choose a Windows command and interpret what the result tells you.
Start quiz
About
I studied animation and visual effects before moving into IT support. I now support classroom technology and maintain labs for Active Directory, Microsoft 365, and networking. My previous onsite work included Windows systems, receipt printers, network equipment, CCTV/IP cameras, and structured cabling.
Read about my backgroundResume and contact
My resume is available as a PDF. You can also email me or review the full project repositories on GitHub.