3Com WX2200 3CRWX220095A, WXR100 3CRWXR10095A, WX4400 3CRWX440095A, WX1200 3CRWX120695A Des, Dhcp

GLOSSARY 679

DES	Data Encryption Standard. A federally approved symmetric encryption
	algorithm in use for many years and replaced by the Advanced
	Encryption Standard (AES). See also 3DES.
DHCP	Dynamic Host Configuration Protocol. A protocol that dynamically
	assigns IP addresses to stations, from a centralized server. DHCP is the
	successor to the Bootstrap Protocol (BOOTP).
dictionary attack	An attempt to gain illegal access to a computer or network by logging
	in repeatedly with passwords that are based on a list of terms in a
	dictionary.
Diffie-Hellman	A key exchange algorithm that was the first public-key algorithm ever
	published. Diffie-Hellman can be used anonymously (without
	authentication). Anonymous Diffie-Hellman is used to establish the
	connection between the 3Com Wireless Switch Manager (3WXM) and
	a Wireless Switch (WX).
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	See DSA.
Algorithm
direct-sequence	See DSSS.
spread-spectrum
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.