The 6- slot Catalyst 6506 chassis provides intermediate port densities, ideal for many wiring closet and core network deployments. The Cisco Catalyst 6506 Firewall Security System is a three-slot model providing a turnkey solution that integrates a Cisco Catalyst 6000 Supervisor 2 (with integrated Policy and Multilayer Switch Feature cards [PFC2/MFC2] for system control, routing services, and dual-Gigabit-Ethernet ports); a Cisco Catalyst Firewall Service Module providing 5 Gbps of firewall services; and a single open slot for site customization.The Cisco Catalyst IPSec VPN systems take advantage of the Cisco Catalyst IPSec VPN Service Module and provide up to 2 Gbps of Triple Data Encryption Standard (3DES) encryption. The Cisco Catalyst 6506 IPSec VPN System provides a broad suite of services and a multitude of I/O interfaces inherent in the Cisco Catalyst 6500 Series.