D-Link DWS-1008 - AirPremier MobileLAN Switch Product Manual page 477

Diffie-Hellman - A key exchange algorithm that was the first public-key algorithm ever published. Diffie-
Hellman can be used anonymously (without authentication).
Diffserv - Differentiated services. An architecture for providing different types or levels of service for
network traffic. Diffserv aggregates flows in the network so that routers and switches need to distinguish
only a relatively small number of aggregated flows, even if those flows contain thousands or millions of
individual flows.
digital certificate - A document containing the name of a user (client) or server, a digital signature, a
public key, and other elements used in authentication and encryption. See also X.509.
digital signature - The result of encrypting a hash of a message or document with a private key. A
digital signature is used to verify the authenticity of the sender and the integrity (unaltered condition) of
the message or document. See also hash.
Digital Signature Algorithm - See DSA.
direct-sequence spread-spectrum - See DSSS.
domain - (1) On the Internet, a set of network addresses that are organized in levels. (2) In Microsoft
Windows NT and Windows 2000, a set of network resources (applications, printers, and so forth) for a
group of users (clients). Clients log into the domain to access the resources, which can be located on a
number of different servers in the network.
DSA - Digital Signature Algorithm. The public-key algorithm used to sign X.509 certificates.
DSSS - Direct-sequence spread-spectrum. One of two types of spread-spectrum radio technology
used in wireless LAN (WLAN) transmissions. To increase a data signal's resistance to interference, the
signal at the sending station is combined with a higher-rate bit sequence that spreads the user data in
frequency by a factor equal to the spreading ratio. Compare FHSS.
DTIM - Delivery traffic indication map. A special type of traffic indication map (TIM) element in a beacon
frame that occurs only when a station in a basic service set (BSS) is in power-save mode. A DTIM
indicates that any buffered broadcast or multicast frames are immediately transmitted by an access
point (AP).
DXF format - A tagged data representation, in ASCII format, of the information contained in an AutoCAD
drawing file.
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