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DMZ: A single computer or group of computers that can be accessed by both users on the
Internet as well as users on the Local Network, but that is not protected by the same security as
the Local Network.
DHCP
Dynamic Host Configuration Protocol: Used to automatically assign IP addresses from a
predefined pool of addresses to computers or devices that request them
Digital certificate:
An electronic method of providing credentials to a server in order to have access to it or a
network
Direct Sequence Spread Spectrum
DSSS: Modulation technique used by 802.11b wireless devices
DMZ
"Demilitarized Zone". A computer that logically sits in a "no-mans land" between the LAN and
the WAN. The DMZ computer trades some of the protection of the Access Point's security
mechanisms for the convenience of being directly addressable from the Internet.
DNS
Domain Name System: Translates Domain Names to IP addresses
Domain name
A name that is associated with an IP address
Download
To send a request from one computer to another and have the file transmitted back to the
requesting computer
DSL
Digital Subscriber Line. High bandwidth Internet connection over telephone lines
Duplex
Sending and Receiving data transmissions at the sane time
Dynamic DNS service
Dynamic DNS is provided by companies to allow users with Dynamic IP addresses to obtain a
Domain Name that will always by linked to their changing IP address. The IP address is
updated by either client software running on a computer or by a Access Point that supports
Dynamic DNS, whenever the IP address changes
Dynamic IP address
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