A client of mine had a network that was constantly under malicious attack. When the client was connected to the Internet, the corporate network routers and switches lit up like a Christmas tree. When the Internet connection was unplugged, network utilization hovered around its normal 2 to 3 percent. Hackers were sending millions of packets across the network, but the client didn't know how. The client had plugged a network sniffer into the network to capture malicious packets, ...