Unknown Device on Your Network? How to Identify It (and When to Worry)
Found an unfamiliar device on your Wi-Fi? Here’s how to identify it by MAC vendor, rule out your own gear, and know when to actually worry.
Why Does the Internet Drop When You Connect an NVR or DVR?
Internet drops the instant you plug in an NVR or DVR? Rogue DHCP servers, IP conflicts, and switch loops are usually why — here’s the fix.
Can You Split Your PC’s Network Traffic for Gaming vs. Browsing?
You want to split network traffic between gaming and downloads using two routers. Here’s why that backfires, and the simpler fix that actually works.
How to Find Unknown IP Camera Addresses on a Network
Need to find IP camera addresses with no documentation and mixed brands? Here’s how to discover them with ONVIF probes, nmap, and MAC vendor filtering.
How to Access Your Home Network While Traveling with Tailscale
Tailscale lets you reach your home network from anywhere, even behind CGNAT with a dynamic IP. Here’s the travel router setup, and the route approval step most people miss.
Untrusted Root Certificate Popup in Chrome: Is My Computer Hacked?
An untrusted root certificate popup in Chrome is alarming, but rarely means malware. Here’s what causes it, how to inspect the certificate, and when to actually worry.
Spanning Tree Protocol (STP) Issues and How to Fix Them
Spanning Tree Protocol issues are easy to misdiagnose. Here’s what causes a wrong root bridge, err-disabled ports, broadcast storms, and slow convergence — and how to fix each.
Circuit Switching vs. Packet Switching Explained (and Why Switches Confuse the Terminology)
Circuit switching vs. packet switching confuses students because “packet” has two meanings. Here’s the real difference, and why a Layer 2 switch still counts.
MTU Explained: How Packet Size Breaks VPNs and Large Transfers
MTU is the largest packet a network link can carry. Learn why large downloads hang over VPNs while browsing works fine, how Path MTU Discovery works, and how to fix it.
IPv6 Address Types Explained: Why One Device Has So Many
IPv6 gives every device several addresses at once, not one. Learn what link-local, global unicast, unique local, and multicast addresses do, and why privacy extensions rotate one every day.