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Glossary

ALMA A Logical Modernization Approach - Department model for automated information systems and telecommunications modernization based on use of Information Technology (IT) standards and commercial products.
Bandwidth Term used to identify, or 'measure' the capacity of a telecommunications circuit or local area network (LAN).
DMS Defense Message System - DoD telegram system replacing AUTODIN, based on the use of the X.400 Message Standard and the X.500 Directory Service Standard.
DTS Diplomatic Telecommunications Service - global network of telecommunications circuits serving the Foreign Affairs Community of more than 50 Federal agencies. The DTS is a combination of government owned and operated circuits plus commercially operated circuits leased by the government.
DTS-PO The Diplomatic Telecommunications Service - Program Office - manages the DTS, operating under the authority of legislation directing the Foreign Affairs Community to use DTS circuits for overseas data and communications exchanges.
Encryption Electronic coding techniques used to protect information from disclosure to unauthorized readers, to prevent undetected modification of the information, and to support reader to writer identification and authentication.
Firewall A network device used to regulate the flow of information packets between networks. A firewall implements the IT security policy by screening packets to verify they comply with policy, do not contain malicious code, and do not attempt to intrude on the protected network or disrupt its operations.
IP Internet Protocol - the basic standard established for data exchange over the world-wide Internet and widely adopted by organizations operating private networks, such as the Department's Open Net and ALMA-based LANs.
MAN Metropolitan Area Network - a regional, high speed network that interconnects facilities within a metropolitan area.
PKI Public Key Infrastructure - A system that provides for the management and distribution of keys used in public encryption services such as Digital Signature.
Protocol A defined structure, content, and flow for communications between computers and other networked devices.
Scaleability For IT, the ability of an application, system, and/or network to expand to meet demands for increased capacity and/or faster processing.
SLA Service Level Agreement - a definition of the type, quality, and quantity of network services agreed to by the provider and the customer.
S/MIME Secure/Multipurpose Internet Mail Extension - a protocol that provides for the secure transmission, using public key encryption, of e-mail and attachments as well as any MIME entity such as information on a web page.
Standard National and/or International agreement on the rules, procedures, and content of AIS and telecommunications exchanges.
STU Secure Telephone Unit - The STU series supports encrypted transmission of voice, data, and facsimile information between users. Various classification levels are supported through the use of separate keylists.
VPN Virtual Private Network - a capability to provide protected, 'private' communications services across a public, shared network.

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