Glossary

DoS (denial of service)—

A specific type of network attack that overloads some aspect of a server's network communication to force the server to deny access to legitimate traffic.

PIX (Private Internet Exchange)—

The Cisco range of leading hardware-based firewalls.

VPN (Virtual Private Network)—

A secure connection over an unsecured medium. The connection is secured by the use of tunneling encryption and protocols.