Applications are computer programs that have a user interface. An application is so named because the program is designed for a specific task or application for the user. Email programs, web browsers and computer games are examples of applications.

Asymmetric Digital Subscriber Line (ADSL) uses existing copper telephone lines to send and receive data at speeds that far exceed conventional dial-up modems. The technology is used to provide high-speed Internet access along the same line used for voice or telephony services. ADSL maximum data transfer rates differ for uploading and downloading data.

The Active Directory provides information on objects including services, resources and users. The AD allows the control of security settings and access to the objects.

An Access Server or Network Access Server connects devices to a Local Area Network (LAN) or Wide Area Network (WAN). Internet Service Providers are able to provide customers with Internet connectivity using the Access Server. The server provides user authentication and permits the flow between the user host and hosts.