The Cisco IDS 4200 Series appliance sensors are purpose-built, high-performance network security "appliances" that protect against unauthorized, malicious activity traversing the network, such as attacks by hackers. Cisco IDS sensors analyze traffic in real time, enabling users to quickly respond to security breaches.The entire Cisco IDS appliance portfolio delivers a broad range of solutions that allow easy integration into many different environments, including enterprise and service provider environments. Each appliance sensor addresses the bandwidth requirements at one of a variety of performance marks, from 45 Mbps to gigabit. The Cisco IDS 4210 can monitor up to 45 Mbps of traffic and is suitable for T1/E1 and T3 environments.