D-Link DGL-4300 manual Appendix

Appendix

D

Data – Information that has been translated into binary do that it can be processed or moved to another device

Data Encryption Standard – Uses a randomly selected 56-bit key that must be known by both the sender and the receiver when information is exchanged

Data-Link layer – The second layer of the OSI model. Controls the movement of data on the physical link of a network

Database – Organizes information so that it can be managed updated, as well as easily accessed by users or applications.

DB-25 – A 25 ping male connector for attaching External modems or RS-232 serial devices

DB-9 – A 9 pin connector for RS-232 connections

dBd - decibels related to dipole antenna

dBi - decibels relative to isotropic radiator

dBm - decibels relative to one milliwatt

Decrypt – To unscramble an encrypted message back into plain text

Default – A predetermined value or setting that is used by a program when no user input has been entered for this value or setting

Demilitarized zone – 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 requests 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

DNS – Domain Name System. Translates Domain Names to IP addresses

DOCSIS – Data Over Cable Service Interface Specifications. The standard interface for cable modems

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 – DDNS 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 DDNS, whenever the IP address changes

59 D-Link Systems, Inc.