Telindus 1110ADSL Bridge, Руководство пользователя

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User’s Guide December, 2002 33
APPENDIX A:
GLOSSARY
When you order Internet service, your provider will give you a great deal of information. Def-
initions of common configuration terms are available below. Please note that terminology used
by various remote networks may vary.
TERM DESCRIPTION
ADSL
(Asymmetric Digital
Subscriber Line) Currently the most common DSL technology available that provides
asymmetrical bandwidth over a single copper wire pair (over your regu-
lar telephone line). The downstream bandwidth from the network to the
subscriber is greater than the upstream bandwidth from the subscriber to
the network. ADSL speeds typically run from 1.5 megabits per second to
8 megabits per second downstream and 64 kilobits per second to 640
kilobits per second upstream.
Bandwidth The amount of data that can be transmitted by the network “information
highway”, used as an indication for speed of data transmission. An
Ethernet link is capable of moving 10 million bits of data per second.
Bit The term used to refer to a single unit of data in digital data communica-
tions. It takes 8 bits to make 1 byte, which is a unit of measurement for
computer data.
Bps
(Bits per second) Refers to the unit of measurement used for data transmission speeds over
a data communication link, e.g. ADSL runs at 6 Mbps (MegaBits per
second).
Bridge A hardware device that passes packets between multiple network seg-
ments using the same networking protocol to connect the different net-
work segments. A DSL modem is a bridge that passes DSL from one
network segment to another. Bridge operates at the hardware layer and
has no routing capabilities.
Broadband Any high-bandwidth (see also Bandwidth ) data communication technol-
ogy that runs at speeds of 200 kilobits per second or more and allows
combined transmission of voice, data, and video over a single physical
connection. Broadband is in contrast to narrowband such as traditional
56K analog modem. DSL, Cable, wireless, and satellite technology are
all different types of broadband technology.
Byte A unit of data equaling to 8 bits (1 Byte = 8 bits).
DHCP
(Dynamic Host Con-
figuration Protocol) An Internet protocol that allows the DHCP server to dynamically assign
IP addresses to any client workstation (any device connected to your
LAN, such as a PC) for a set period of time and then sends them back so
that they can be reassigned to other workstations. This feature saves the
ISP and Network Managers from having to manually configure IP
addresses for each PC on the LAN.