ZyXEL X-550 User’s Guide
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
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.
F
Fiber optic
A way of sending data through light impulses over glass or plastic wire or fiber
File server
A computer on a network that stores data so that the other computers on the network can all access it
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