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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 router'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 router that supports Dynamic DNS, whenever the IP address changes
Dynamic IP address
IP address that is assigned by a DHCP server and that may change. Cable Internet providers usually use this
method to assign IP addresses to their customers.
E
EAP
Extensible Authentication Protocol
Email
Electronic Mail is a computer-stored message that is transmitted over the Internet
Encryption
Converting data into cyphertext so that it cannot be easily read
Ethernet
The most widely used technology for Local Area Networks.
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