| Summary

| This module introduced the concept of firewalls and firewall technology. These technologies included proxy server, packet filtering, and stateful packet filtering. The Cisco PIX Security Appliance was also discussed. Particular emphasis was placed on the various models, their capabilities, and how they are utilized in a network. Finally, the basic capabilities and configuration of the PIX Security Appliance were discussed. This discussion included DHCP services, routing capabilities, and user interfaces. In subsequent modules, these topics will be examined in greater detail and functionality for the PIX Security Appliance will be introduced.