4-Port ADSL Router User Manual

Terminology
187
DHCP
(Dynamic Host Configuration Protocol)
DHCP automates address assignment and management. When
a computer connects to the LAN, DHCP assigns it an IP address
from a shared pool of IP addresses; after a specified time limit,
DHCP returns the address to the pool.
DHCP relay
(Dynamic Host Configuration Protocol relay)
A DHCP relay is a computer that forwards DHCP data between
computers that request IP addresses and the DHCP server that
assigns the addresses. Each of the ADSL Barricade's interfaces
can be configured as a DHCP relay. See DHCP.
DHCP server
(Dynamic Host Configuration Protocol server)
A DHCP server is a computer that is responsible for assigning
IP addresses to the computers on a LAN. See DHCP.
digital
Of data, having a form based on discrete values expressed as
binary numbers (0's and 1's). The data component in DSL is a
digital signal. See also analog.
DNS
(Domain Name System)
The DNS maps domain names into IP addresses. DNS
information is distributed hierarchically throughout the Internet
among computers called DNS servers. When you start to access
a web site, a DNS server looks up the requested domain name to
find its corresponding IP address. If the DNS server cannot find
the IP address, it communicates with higher-level DNS servers
to determine the IP address. See also domain name.