Appendix D
Glossary
ADSL
Asymmetric digital subscriber line (ADSL) is a new modem technology that
converts existing twisted-pair telephone lines into access paths for high-speed
communication of various sorts.
Auto-MDI/MDIX
On a network hub or switch, an auto-MDI/MDIX port automatically senses if it
needs to act as a MDI or MDIX port. The auto- MDI/MDIX capability eliminates
the need for crossover cables.
Auto-negotiate
To automatically determine the correct setting. The term is often used with
communications and networking
DHCP
The Dynamic Host Configuration Protocol (DHCP) is an Internet protocol for
automating the configuration of computers that use TCP/IP. DHCP can be used
to automatically assign IP addresses, to deliver TCP/IP stack configuration
parameters such as the subnet mask and default router, and to provide other
configuration information such as the addresses for printer, time and news
servers.
DMZ
In computer networks, a DMZ (demilitarized zone) is a computer host or small
network inserted as a "neutral zone" between a company's private network and
the outside public network. It prevents outside users from getting direct access
to a server that stores company data. Typically, the DMZ contains devices
accessible to Internet traffic, such as Web (HTTP) servers, FTP servers, SMTP
(e-mail) servers and DNS servers.
DNS
The Domain Name System (DNS) is a distributed Internet directory service.
DNS is used mostly to translate between domain names and IP addresses, and
to control Internet email delivery. Most Internet services rely on DNS to work. If
DNS fails, web sites cannot be located and email delivery service will be
suspended.
Dynamic IP Address
An IP address is automatically assigned to a user’s AP in a TCP/IP network
typically by a DHCP server.
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