An open switch port is an open door: anyone can plug in a laptop, a personal Wi-Fi router or an extra switch and join your network. Port sec...

When one uplink between two switches is not enough, adding a second cable does not help by itself: Spanning Tree blocks it. EtherChannel sol...

Spanning Tree Protocol (STP) is the reason you can cable switches in a loop for redundancy without melting your network with a broadcast sto...

Static routes and default routes are the first routing tools every network engineer learns, and they are still everywhere in production: on ...

Every home router and almost every office edge router you will ever touch is doing NAT. In this lab you will build a small office network in...