User`s manual

Appendix F Glossary
113
KEYWORD EXPLANATION
data terminal equipment (DTE) or data communication equipment
(DCE) devices.
DCE
Data Communication Equipment is typically a modem or other type
of communication device. The DCE sits between the DET (data
terminal equipment) and a transmission circuit such as a phone line.
DHCP
Dynamic Host Configuration Protocol automatically assigns IP
address to clients when they log on. DHCP centralizes IP address
management on the central computers that run the DHCP server
program.
DNS
Domain Name System. A database of domain names and their IP
address-e-s. DNS is the primary naming system for many distributed
networks, including the internet.
Domain Name
The unique name that identifies an Internet site. Domain Names
always have 2 or more parts that are separated by dots. Generally
speaking, the part on the left is the most specific and the part on the
right is the most general.
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 services, ranging in speeds form 16 K
bits/sec to 52 M bits/sec. The services are either symmetric (traffic
flows at the same speed in both directions) or asymmetrical (the
downstream capacities higher than the upstream capacities). DSL
connections are point-to-point dedicated circuits, which means 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 or Internet-connect system.
DSLAM
A Digital Subscriber Line Access Multiple-x-e-r 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 the a high-speed backbone line using multiplexing
techniques. Depending on the product, DSLAM Multiple-x-e-r
connects DSL lines with some combination of asynchronous transfer
mode ATM, frame relay or IP networks.
DTE
Originally, Data Terminal Equipment meant Dumb Terminal
Equipment. But today it is a computer, bridge or router that
interconnects local area network (LAN) in increasingly more