Our new, refurbished and used Cisco Traffic Anomaly Detector XT 5600 delivers multigigabit performance to protect the largest enterprise environments by rapidly detecting and alerting users to potential distributed denial-of-service (DDoS) , worm , and other attacks. Detection is based on sophisticated anomaly detection capabilities that compare current activity to profiles of known “normal” behavior , enabling the Traffic Anomaly Detector XT to identify even day-zero attacks that have never been seen before.