Must-Read Blog for Networkers

The reason so many security researchers can run their l33t 0-day attacks on Web appz is that they (usually) don't have to worry about the underlying network layers failing them. I've always been more interested in network plumbing, particularly at the WAN and backbone levels. If you sympathize, you must read the Renesys Blog. Posts like Pakistan Hijacks YouTube and Iran Is Not Disconnected are primers on how the Internet works. Those guys rock.