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[Sunite]

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Data Encryption Key (DEK)

Used for encryption and decryption of message text.

 

Data Encryption Standard (DES)

Standardized encryption method used most on the Internet.

 

datagram

A block of data that can travel from one Internet site to another without relying on an earlier exchange between the source and destination computers.

 

DDN (Defense Data Network)

The United States Department of Defense global communications network.

 

DECnet

A proprietary network protocol designed by Digital Equipment Corporation.

 

dedicated line

A communications line used solely for computer connections, such as T1 and T3 lines. An additional phone line solely for your modem is a dedicated line as well.

 

Defense Data Network (DDN)

The United States Department of Defense global communications network.

 

dial-up

Most widely used way of accessing the Internet. This involves one computer connecting to another by way of a modem.

 

DNS (Domain Name Service)

A name service used with TCP/IP hosts. A DNS exists on numerous servers over the Internet. It is a database for finding host names and IP addresses on the Internet and trying to figure them out.

 

domain

An area on host or an IP address.

 

Domain Name Service (DNS)

A name service used with TCP/IP hosts. A DNS exists on numerous servers over the Internet. It is a database for finding host names and IP addresses on the Internet and trying to figure them out.

 

dot address

IP addresses in the form of 1.1.1.1 in a 4-byte IP address where each number is equal to 1 byte.