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A wireless high-speed Internet connection provided by satellites. Some satellite broadband connections are two-way--up and down. Others are one-way, with the satellite providing a high-speed downlink and then using a dial-up telephone connection or other land-based system for the uplink to the Internet.
(time division multiple access)
(universal mobile telecommunications service)
A computer that lets other computers and devices on a network share its resources, including print servers, Internet servers and data servers. A server can also be combined with a hub or router.
The range of frequencies designated by a National Telecommunications Regulatory Authority for a category of use or uses.
A network device that selects the path that a data packet will take to its next destination, ensuring optimal network performance. The switch opens and closes the electrical circuit to determine whether and to where data will flow.
A personal computer that allows a user to take notes using natural handwriting on a stylus- or digital pen-sensitive touch screen instead of requiring the use of a keyboard. The tablet PC is similar in size and thickness to a yellow paper notepad. A technology used in digital cellular telephone communication that divides each cellular channel into three time slots in order to increase the amount of data that can be carried.
An encryption method which, like DES, operates on 64-bit data blocks. There are several forms, each of which uses the DES cipher three times. Some forms use two 56-bit keys, some use three.
A 3G broadband, packet-based transmission of text, digitized voice, video and multimedia at data rates up to 2 Mbps. It will offer a consistent set of services to mobile computer and phone users no matter where they are located in the world. Based on the global system for mobile (global system for mobile communication) communication standard, UMTS, endorsed by major standards bodies and manufacturers is the planned standard for mobile users.
VoIP (voice-over IP)
VPN (virtual private network)
(very small aperture terminal)
WAN (wide area network)
(wireless application protocol)
A technology that supports voice transmission via IP-based LANs, WANs and the Internet.
A way to use a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization’s network. A virtual private network can be contrasted with an expensive system of owned or leased lines that can only be used by one organization. A VPN maintains privacy through security procedures and tunneling protocols and encryption.
An earthbound station used in communications of data, voice and video signals, excluding broadcast television, consisting of two parts: a transceiver placed outdoors in direct line-of-sight to the satellite, and a device placed indoors to interface the transceiver with the end user’s communications device, such as a PC.
A geographically dispersed telecommunications network. The term distinguishes a broader telecommunication structure from a local area network or LAN. A wide area network may be privately owned or rented, but the term usually connotes the inclusion of public (shared user) networks.
A specification for a set of communication protocols to standardize the way that wireless devices, such as cellular telephones and radio transceivers, can be used for Internet access, including email, the World Wide Web, newsgroups, and Internet relay chat (IRC). While Internet access has been possible in the past, different manufacturers have used different technologies. In the future, devices and service systems that use WAP will be able to interoperate.
(wideband code-division multiple access)
(wired equivalent privacy)
(short for ‘wireless fidelity’)
(wireless Internet service provider) WPA (Wi-Fi protected access)
WLAN (wireless LAN)
An ITU standard derived from code-divi-sion multiple access (CDMA), officially known as IMT-2000 direct spread. WCDMA is a 3G mobile wireless technology offering much higher data speeds to mobile and portable wireless devices than commonly offered in today’s market.
A security protocol, specified in the IEEE wireless fidelity (Wi-Fi) standard, 802.11b, that is designed to provide a wireless local area network (WLAN) with a level of security and privacy comparable to what is usually expected of a wired LAN.
The popular term for a high-frequency wireless local area network (WLAN). The Wi-Fi technology is rapidly gaining acceptance in many companies as an alternative to a wired LAN. It can also be installed for a home network. Wi-Fi is specified in the 802.11b specification from the IEEE and is part of a the
802.11 series of wireless specifications. The 802.11b (Wi-Fi) technology operates in the 2.4 GHz range offering data speeds up to 11 Mbps.