Interop: 12 killer (and free) tools for network engineers

LAS VEGAS -- Visibility is key to troubleshooting network woes, but getting such access can be expensive. To help out, a veteran networking pro shared with attendees of the Interop conference in Las Vegas his list of a dozen mostly free “killer” tools.
Network Protocol Specialists owner Mike Pennacchi: Free tools can be customized to fit your needs
“There are commercial tools that do most of these functions,” says Mike Pennacchi, owner and lead network analyst at Network