Xpeed 320R, Руководство пользователя

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Glossary
98 Xpeed Networks, Inc.
Analog line - A communications line, such as ordinary phone line, that carries
continuously varying signals.
Attenuation - Signal loss resulting from transversing the transmission medium.
Backbone - A major transmission path used for high-volume network-to-network
connections. In DSL-to-Internet connections, a backbone network consolidates
data traffic from the individual DSL lines into a backbone network for deliver to
the ISP.
Bandwidth - The difference between the highest and lowest frequencies of a band
that can be passed by a transmission medium without undo distortion. As a mea-
sure of carrying capacity, bandwidth indicates how many bits per second (bps) a
link can carry.
bps (bits per second) - The rate of data transfer over a communication line.
Bridge - Bridging connects networks that use the same communications proto-
cols. Bridging uses a MAC (media access control) address to locate and send
information from one network to another.
Browser - See Web browser.
CAT-5 - Category 5 unshielded twisted pair wiring commonly used for 10Base-T
and 100Base-T Ethernet networks.
CHAP (Challenge Handshake Authentication Protocol) - A security protocol that
arranges an exchange of random numbers between computers. The machine
receiving the number from the first computer performs calculations on that num-
ber using a previously agreed-upon string of characters as a secret encryption key.
CLEC (Competitive Local Exchange Carrier) - A telecommunications company
that manages access to local loops.
Central Office (CO) - A building where the local switching equipment, including
the DSLAM, is found.
CPE (Customer premises equipment) - Equipment residing at the customer/end-
user’s premises used to connect to the service provider’s network.
Crosstalk - The interference caused by signals on adjacent circuits in a network,
crosstalk is a hazard that limits distance and speed on digital networks.