ipconfig command in Windows: beyond /all
Every Windows administrator knows ipconfig It is usually the first command run when something on the network stops working. But ipconfig…
Networking and DNS
Network and DNS troubleshooting on Windows: ipconfig, netstat, route, tracert, nslookup and the PowerShell network cmdlets.
How to check open ports on Windows: built-in tools vs Port Checker
Checking whether a port is open - on the local machine or on a remote server - comes up in almost every…
NETSTAT command in Windows
When a port is unreachable, a service is not responding, or something is holding a connection open, netstat is the first command…
nslookup in Windows: DNS troubleshooting from basic queries to AD diagnostics
Every DNS problem in a Windows environment starts the same way: something that should resolve doesn't, and you need to know why.…
IP Subnetting Cheat Sheet
Complete IPv4 and IPv6 subnetting reference. Subnet masks, CIDR notation, binary breakdown, private ranges, VLSM examples, and key formulas.
Internet speed tests in Windows from CMD and PowerShell
Testing a connection through a browser means loading a page, waiting for ads and reading a gauge that rounds everything. On a…