I love new security testing tools. There is nothing quite like finding some magical bits of code allowing you to use and abuse protocols in unique and unnatural ways. I was introduced to Loki at ...

Cisco Discovery Protocol (CDP) is a link layer discovery protocol that has been integrated into Cisco switches and routers ever since I can remember. Cisco introduced CDP support into their routers ...

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 ...

Network layer routing protocols provide the communication protocols and algorithms for determining routes to every destination and also for distributing the routing information throughout the network.

Routers accept data packets and forward them to a list of destinations it knows about. These destinations can be other routers, or the intended destination of a computer communicating through the ...