Motorola SURFboard SBG901, Руководство пользователя

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B Glossary 125
This document is uncontrolled pending incorporation in PDM
TERM DEFINITION
U-Z
UDP User Datagram Protocol
unicast A point-to-point data transmission sent from one sender to one
receiver. This is the normal way you access websites. See also
broadcast and multicast.
upstream In a cable data network, upstream describes the direction of data sent
from the subscriber’s computer through the cable modem to the CMTS
and the Internet.
USB Universal Serial Bus is a computer interface for add-on devices such as
printers, scanners, mice, modems, or keyboards. USB supports data
transfer rates of 480 bps and plug-and-play installation. You can
connect up to 127 devices to a single USB port.
VLAN
A virtual local area network is group of devices on different LAN
segments that are logically configured to communicate as if they are
connected to the same wire.
WAN A wide-area network provides a connection over a large geographic
area, such as a country or the whole world. The bandwidth depends on
need and cost, but is usually much lower than for a LAN.
WAP Wireless access point or Wireless Access Protocol. See also access
point
WECA The Wireless Ethernet Compatibility Alliance is a trade organization that
works to ensure that all wireless devices (computer cards, laptops, air
routers, PDAs, etc) can communicate with each other.
WEP
Wired Equivalent Privacy encryption protects the privacy of data
transmitted over a WLAN. WEP uses keys to encrypt and decrypt
transmitted data. The access point must authenticate a client before it
can transfer data to another client. WEP is part of IEEE 802.11b.
Because WEP can be difficult to use and does not provide very strong
encryption, Motorola recommends using WPA if possible.
Wi-Fi Wireless fidelity (pronounced y-phi) brand name applied to products
supporting IEEE 802.11b.
Wireless Cable Modem
Gateway The Motorola SURFboard Wireless Cable Modem Gateway is a single
device that combines a cable modem, router, Ethernet switch, wireless
access point, and DHCP server for SOHO or SME use.