Writing archive
Notes on networks and networking
Chronological articles on networking fundamentals, routing and switching logic, protocols, and the practical side of how connections work.
Troubleshoot The Link Before The Application
A slow, unreachable application does not tell you which layer is at fault. A steady check from physical link to…
October 31, 2026
What A VLAN Does—and Does Not Do
A VLAN can separate Layer 2 traffic, but it does not automatically provide every kind of isolation. Understanding the boundary…
October 31, 2026