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GLOSSARY
 
802.11
A family of wireless specifications developed by a working group of the Institute of Electrical and Electronics Engineers. These specifications are used to manage packet traffic over a network and ensure that packets do not collide-which could result in loss of data-while traveling from their point of origin to their destination.
 
802.11b
Industry standard for wireless Internet use, analogous to Wi-Fi. Operates through radio frequencies around 2.4 GHz. Common electronics like cordless phones and microwaves also operate on this frequency.
 
Access Point
A hardware device that serves as a communications hub to provide a wireless connection to a wireless-enabled computer. The range of an Access Point can be up to 300 feet.
 
Bandwidth
The size of a network "pipe" or channel for communications in wired networks. In wireless, it refers to the range of available frequencies that can carry signal.
 
Bits per Second (bps)
A measurement of how fast data moves over a communication line. A bit is the basic measure of data.
 
(Firewall)
A software program that keeps unauthorized users out of a private network. Everything entering or leaving a system's internal network passes through the firewall and must meet the system's security standards in order to be transmitted. Often used to keep unauthorized people from using systems connected to the Internet.
 
Gigahertz (GHz)
One billion hertz. A Hertz is the international unit for measuring frequency, equivalent to the older unit of cycles per second. The standard U.S. electrical power frequency is 60 Hz and wireless 802.11 LANs operate at 2.4 GHz.
 
Internet (ΔΙΑΔΙΚΤΥΟ)
A global network of computer networks, evolved from the ARPANET that use TCP/IP to communicate and share information. Often, the Internet refers to a group of Local Area Networks (LAN) connected by wire, radio, satellite signals or some other form of communication.
 
Internet Protocol
A method or protocol by which data is sent from one computer to another on a network or over the Internet. IP provides the basis of the Internet.
 
IP-Address (IP)
A 32-bit number that identifies each sender or receiver of information that is sent across the Internet. An IP address has two parts: the identifier of a particular network on the Internet and an identifier of the particular device (which can be a server or a workstation) within that ne
 
Internet Service Provider (ISP)
An organization that provides access to the Internet. Small ISPs provide service via modem and ISDN while the larger ones also offer private line hookups (T1, fractional T1, etc.).
 
Local Area Network (LAN)
A high-speed, privately owned computer network covering a limited geographical area, such as an office or a building. The benefits include the sharing of Internet access, files, and equipment such as printers and storage devices. Wireless LANs use wireless communications in a home or office to network all PCs together.
 
Wi-Fi (shorthand for "wireless fidelity")
Is the common term for a high-frequency wireless local-area network (WLAN). The term used generically when referring of any type of 802.11 network, whether 802.11b, 802.11a, dual-band, etc. Wi-Fi operates in the 2.4 GHz range offering data speeds up to 54 megabits per second. Wi-Fi is gaining acceptance as an alternative to a wired LAN in companies and multicomputer homes.
 
Wireless LAN
It uses radio frequency technology to transmit network messages through the air for relatively short distances, like across an office building or college campus. A wireless LAN can serve as a replacement for or extension to a wired LAN.
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