HNW300CI
User
Manual
36
Wireless PCI Card
Data-Link layer
The second layer of the OSI model. Controls the movement of data on the physical link of a
network
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 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
Electronic Mail is a computer-stored message that is transmitted over the Internet
