Cisco's Intrusion Detection Systems come in a variety of sizes and capabilities to protect networks of various sizes.  Running Cisco's IDS 4.0 software these systems address the four critical elements for effective intrusion detection:

• Accurate threat detection
• Intelligent threat identification
• Ease of management
• Flexible deployment options

Models:

IDS-4210 - 45Mbps performance, a 566MHz processor and 256MB of memory

IDS-4235 - 200Mbps performance, a 1.26GHz processor and 1GB of memory

IDS-4250 - 500Mbps performance, dual 1.26GHz processors and 2GB of memory

IDS-4250-XL - 1000Mbps performance, dual1.26GHz processors and 2GB of memory