ZyXEL Communications Prestige 314 User Manual page 182

Prestige 314 Broadband Sharing Gateway with 4-Port Switch
other systems.
Digital The use of a binary code to represent information, such as 0/1, or on/off.
DNS
Domain Name System links names to IP addresses. When you access Web sites on the
Internet you can type the IP address of the site or the DNS name. When you type a
domain name in a Web browser a query is sent to the primary DNS server defined in
your Web browser's configuration dialog box. The DNS server converts the name you
specified to an IP address and returns this address to your system. Thereafter, the IP
address is used in all subsequent communications.
The unique name that identifies an Internet site. Domain Names always have two or
Domain Name
more parts that are separated by dots. The part on the left is the most specific and the
part on the right is the most general.
DRAM
Dynamic RAM (Random Access Memory) stores information in capacitors that must
be refreshed periodically.
DSL
Digital Subscriber Line technologies enhance the data capacity of the existing twisted
pair wire that runs between the local telephone company switching offices and most
homes and offices. There are actually seven types of DSL service, ranging in speeds
from 16 Kbits/sec to 52 Mbits/sec. The services are either symmetrical (traffic flows at
the same speed in both directions) or asymmetrical (the downstream capacity is higher
than the upstream capacity). DSL connections are point-to-point dedicated circuits,
meaning that they are always connected There is no dial-up. There is also no
switching, which means that the line is a direct connection into the carrier's frame
relay, ATM (Asynchronous Transfer Mode) or Internet-connect system.
DSLAM
A Digital Subscriber Line Access Multiplexor (DSLAM) is a network device, usually
at a telephone company central office, that receives signals from multiple customer
Digital Subscriber Line connections and puts the signals on a high-speed backbone line
using multiplexing techniques. Depending on the product, DSLAM multiplexers
connect DSL lines with some combination of asynchronous transfer mode ATM, frame
relay or IP networks.
Embedded Web
This is an HTML-based configurator that usually includes an Internet Access Wizard
Configurator
and menus for configuring key settings and features.
Ethernet
A very common method of networking computers in a LAN. There are a number of
adaptations to the IEEE 802.3 Ethernet standard, including adaptations with data rates
of 10 Mbits/sec and 100 Mbits/sec over coaxial cable, twisted-pair cable and fiber-optic
cable. The latest version of Ethernet, Gigabit Ethernet, has a data rate of 1 Gbit/sec.
FAQ Frequently Asked Questions. FAQs are documents that list and answer the most
J Glossary