The NetScreen 204 is a high performance firewall and vpn appliance. It is designed for use in medium and large size offices. The NS 204 has four 10/100 Ethernet ports and offers 400 Mbps of firewall throughput. It can also serve as an IPSec VPN concentrator and supports 1000 concurrent tunnels with 200 Mbps of 3DES encrypted data thoughput. NetScreen appliances run a custom operating system, the ScreenOS, on custom microprocessors for maximum security and performance. The NS 204 is rack mountable and occupies 1U of rack space. The package includes a standard US power cable and a rack mount kit.