Joel is an internationally recognized expert in the areas of security, networking and messaging. Follow him on X (formerly Twitter) @joelsnyder. Building enterprise networks with routers and switches ...

Spanning tree protocol is an essential function of Ethernet networks, and it provides several useful capabilities when used properly. However, STP can cause havoc when a network carrying live video is ...

Those who had an opinion last week were split evenly: CCNA labs need either 2 or 3 switches, and CCNP labs need either 3 or 4. But why? We saw a few opinions floating around the blog last week, but ...