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Aolynk DR811/DR814 ADSL2+Broadband Router 9 Appendix - Glossary
70
DHCP
Dynamic
Host
Configuratio
n 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 server
Dynamic
Host
Configuratio
n Protocol
server
A DHCP server is a computer that is responsible for assigning IP
addresses to the computers on a LAN.
See DHCP
.
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. For example,
www.yahoo.com
is the domain name associated with IP
address 216.115.108.243. 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.
domain
name
A domain name is a user-friendly name used in place of its
associated IP address. Domain names must be unique; their
assignment is controlled by the Internet Corporation for
Assigned Names and Numbers (ICANN). A domain name is a
key element of a URL, which identifies a specific file at a web
site.
See also DNS.
download
To transfer data in the downstream direction, i.e. from the
Internet to the user.
DSL
Digital
Subscriber
Line
A technology that allows both digital data and analog voice
signals to travel over existing copper telephone lines.
Ethernet
The most commonly installed computer network technology,
usually using twisted pair wiring. Ethernet data rates are 10
Mbps and 100 Mbps.
See also 10BASE-T, 100BASE-T, and
twisted pair
.
firewall
A firewall is a method for protecting your computer or LAN from
attacks and other unwelcome or malicious accesses from the
outside (i.e. the Internet). Unauthorized users may attempt to
attack your network in order to prevent you or others on your
LAN from using.
You can protect your network by blocking certain types of IP
traffic commonly used by ‘hackers’ to transport attacks from the
Internet to your LAN (incoming traffic). Similarly, you can restrict
the types of IP traffic sent from your network to the Internet
(outgoing traffic). Some firewall protection can be provided by
packet filtering and Network Address Translation services.
FTP
File Transfer
Protocol
A program used to transfer files between computers connected
to the Internet. Common uses include uploading new or updated
files to a web server, and downloading files from a web server.
Gbps
Abbreviation for Gigabits (“GIG-uh-bits”) per second, or one
billion bits per second. Internet data rates are often expressed in
Gbps.