Encryption Encoding information so that it cannot be deciphered by an unauthorised person. If you have an Intranet, you can turn part of it into an Extranet by allowing customers, suppliers and other key people secure access to the areas they need. Firewall Security technology that prevents unauthorised access to a company's networks by outside users. The global network of computers, routers and cable connections that enables the world's computers to connect to each other. Intranet An internal network that uses the same technology as the Internet to connect its users, most notably employing browsers to provide a common interface.
Intranets can stretch around the world.
ISDN Integrated Services Digital Network, a telecommunications standard for sending data signals, digitised voice and video over the existing Public Switched Telephone Network. ISP Internet Service Provider - a company providing public access to the Internet. Modem A device that converts data so it can be transmitted over telephone lines. A node is a data transmission connection point on the network. Server A network node that provides services to client PCs, for example, file access, print spooling or remote execution.