Disk Defragmenter Arranges the blocks of information for a file into adjacent blocks on your hard drive, which may significantly improve the file access times. DNS Domain Name System. A general purpose distributed, replicated, data query service. Its principal use is the lookup of host IP addresses based on host names. The host names are also known as domain names.
Most countries also have a domain.
E Encoding File transfer formatting that enables encrypted, compressed or binary files to be transferred without corruption or loss of data. Encryption A way of coding information in a file or e-mail message so that if it is intercepted by a third party as it travels over a network it cannot be read. Ethernet An IEEE 802.3 standard data link layer which can operate over several different media including fiber optic, coaxial cable and twisted-pair cable. When you place files on a UNIX system you can assign the files various levels of permission, specifying who can access them, and what type of access they can have. File Server A computer that shares its resources, such as printers and files, with other computers on the network.