Broadband Router with 2 Phone Ports
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Appendix D: Glossary
DDNS (Dynamic Domain Name System) - Allows the hosting of a website, FTP server, or e-mail server with a fixed domain
name (e.g., www.xyz.com) and a dynamic IP address.
Default Gateway - A device that forwards Internet traffic from your local area network.
DHCP (Dynamic Host Configuration Protocol) - A networking protocol that allows administrators to assign temporary IP
addresses to network computers by “leasing” an IP address to a user for a limited amount of time, instead of assigning
permanent IP addresses.
DMZ (Demilitarized Zone) - Removes the Router's firewall protection from one PC, allowing it to be “seen” from the Internet.
DNS (Domain Name Server) - The IP address of your ISP's server, which translates the names of websites into IP addresses.
Domain - A specific name for a network of computers.
Download - To receive a file transmitted over a network.
DSL (Digital Subscriber Line) - An always-on broadband connection over traditional phone lines.
Dynamic IP Address - A temporary IP address assigned by a DHCP server.
Encryption - Encoding data transmitted in a network.
Ethernet - A networking protocol that specifies how data is placed on and retrieved from a common transmission medium.
Finger - A program that tells you the name associated with an e-mail address.
Firewall - A set of related programs located at a network gateway server that protects the resources of a network from users
from other networks.
Firmware - The programming code that runs a networking device.
Fragmentation -Breaking a packet into smaller units when transmitting over a network medium that cannot support the
original size of the packet.
