The Defense Data Network ( English Defense Data Network , DDN) is a computer network of the US Department of Defense that operated from 1983 to 1995 [1] .
Content
History
Since 1975, the Department of Information Support of the Ministry of Defense used the ARPANET network as a working tool. In terms of the further development of the Pentagon’s computer network, the creation of an automatic digital network of the new generation (AUTODIN II) was supposed, but in 1983 this plan was canceled. Instead, in 1983, the MILNET network was allocated from ARPANET for the needs of the Ministry of Defense, and ARPANET remained available only to the academic community and in 1990 ceased to exist. At the same time, ARPANET and MILNET were disconnected for security reasons, communication between them was carried out through network gateways [2] , which would completely disconnect them in the event of an emergency. The Department of Information Support of the Ministry of Defense used the name Defense Data Network for these network programs [3] .
During the 1980s, the Defense Data Network was divided into four subnets with different levels of information security, which in 1990 were converted to NIPRNet , SIPRNet and JWICS .
Defense Data Network subnets included:
- MILNET for transmitting unclassified information ;
- Defense Secure Network One (DSNET 1) to transfer sensitive information ;
- Defense Secure Network Two (DSNET 2) for the transfer of sensitive information ;
- Defense Secure Network Three (DSNET 3) for the transfer of sensitive information of special importance .
MILNET and DSNET 1 were networks for normal users, in many respects similar to the Internet , DSNET 2 was designed for the Global Military Command and Control System , and DSNET 3 was designed to support intelligence information systems of the US Department of Defense.
DDN-NIC
The Defense Data Network (DDN-NIC) network information center was located at the DDN support center in Chantilly, Virginia and provided network services by telephone, email, and regular mail [4] . It was the first organization responsible for assigning TCP / IP addresses.
See also
- ARPANET
- MILNET
- NIPRNet
- SIPRNet
- Joint Worldwide Intelligence Communications System
Notes
- ↑ John Pike, Maintained by Steven Aftergood. Defense Data Network (DDN), Defense Secure Network (DSNET) . Federation of American Scientists (February 11, 2000). The appeal date is April 9, 2011.
- ↑ What is MILNET (Military Network)? (eng.) Computer Hope. The appeal date is May 23, 2013.
- ↑ ARPANET, the Defense Data Network, and the Internet // The Froehlich / Kent Encyclopedia of Telecommunications . - CRC Press, 1990. - Vol. 1. - P. 341–375. - ISBN 978-0-8247-2900-4 .
- ↑ DDN Network Information Center (NIC) . Hytelnet: 1st Directory of Internet Resources (1995).