153 SBG1000 User Guide
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Configuration: Basic Gateway TCP/IP Wireless Print Server USB
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UDP User Datagram Protocol
unicast A point-to-point data transmission sent from one sender to one receiver. This 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 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 12 Mbps and plug-and-play installation.
You can connect up to 127 devices to a single USB port.
UTP unshielded twisted pair (wire)
VLAN A virtual local area network is group of devices on differe nt LAN segments that are logically configured
to communicate as if they are connected to the same wire.
VoIP Voice over Internet Protocol is a method to exchange voice, fax, and other in formation over the
Internet. Voice and fax have traditionally been carried over traditional telephone lines of the PST N
using a dedicated circuit for each line. VoIP enables calls to travel as disc rete data packets on shared
lines. VoIP is an important part of the convergence of computers, telephones, and television in to a
single integrated information network.
VPN A virtual private network is a private network that uses “virtual” connections (t unnels) routed over a
public network (usually the Internet) to provide a secure and fast connection; usually to users working
remotely at home or in small branch offices. A VPN connection provides security and perfo rmance
similar to a dedicated link (for example, a leased line), but at mu ch lower cost.
WAN A wide-area network provides a connec tion over a large geographic area, such as a c ountry or the
whole world. The bandwidth depends on need a nd cost, but is usually much lower than for a L AN.
WAP Wireless access point or Wireless Access Protocol. See al so access point.
WECA The Wireless Ethernet Compatibility Alliance is a trade organization that works to ensur e 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 wi reless LAN.
WEP uses keys to encrypt and decrypt transmitted data. The access point must authenticate a client
before it can transfer data to another client. W EP is part of IEEE 802.11b.
Wi-Fi Wireless fidelity (pronounced y-phi) brand name applied to prod ucts supporting IEEE 802.11b.
Wireless Cable
Modem
Gateway
The Motorola SURFboard Wireless Cable Modem Gateway is a single de vice that combines a cable
modem, router, Ethernet switch, wireless access point, HPNA connection, print server, and DHCP
server for SOHO or SME use.
WLAN wireless LAN
world wide web An i nterface to the Internet that you use to navigate and hyperlink to information.