NTOP is a network traffic probe that can sort network traffic according to protocols, display traffic statistics, show IP traffic distribution among protocols, and identify e-mail addresses of computer users, among other things. Key features: NTOP lets network managers sort network traffic based on various criteria, analyze IP traffic based on source and destination, act as a NetFlow/sFlow collector for flows generated by routers or switches, and produce RMON-like network traffic statistics. (Click to close this window)