|  |  | The CiscoSecure PIX Firewall reduces the day-to-day costs of maintaining a UNIX-based firewall application. The PIX runs in FLASH memory, eliminating both the need for a workstation with a hard drive as well as the Mean Time Between Failure (MTBF) of a network firewall. The PIX also features a hot standby/failure option. When two PIX firewalls are running in parallel, the second PIX is able to assume operation if a failure occurs.