The glossary below contains many of the terms you will find in common use throughout our website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

IP Internet Protocol

The method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one address that uniquely identifies it to all other computers on the Internet.

A data-oriented protocol that is used for communicating data across a packet-switched internetwork. It is a network layer protocol and is encapsulated in a data link layer protocol. As a lower layer protocol, IP provides a unique global address scheme among computers.