We start at the foundation — Layer 1, the physical layer — because 90% of network outages trace back to something you can see and touch. Learn how to read switch port link lights, understand the difference between Cat5e, Cat6, and Cat6A cabling, and why swapping the patch cable before you do anything else can save you hours of unnecessary diagnosis. From there, we move into WiFi and access point placement, covering why the 2.4 GHz band is almost always overcrowded, how to pick the right channels, and what your signal strength reading is actually telling you about your coverage gaps.
Scenes three and four tackle the heart of most enterprise and home network failures — switches and routers. You'll learn how to spot a duplex mismatch, what a VLAN misconfiguration actually looks like in practice, and how to use ARP to verify whether your gateway is even reachable. The video wraps with the one thing every technician forgets until it's too late: DNS. If pinging an IP address works but a domain name doesn't, your routing is fine — your DNS is broken. We show you exactly how to bypass your local resolver and confirm it in two commands.
I try to make complex networking concepts accessible for IT professionals, students, and anyone who manages their own infrastructure.
I put this video together from a few slides from a troubleshooting session I put together.
