|  |  | The CiscoSecure PIX Firewall has the capacity to support up to six 10/100 Ethernet ports, ensuring the necessary port density for proper network security. This allows for numerous segments, including those for DNS, mail, Web servers, user workstations, file servers, and other equipment. The PIX can support up to 256,000 simultaneous connections, more than a typical UNIX-based firewall. The UNIX-based firewall is limited by its CPU, which may not be able to support the rising numbers of users in today's office or campus environments.