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Frequency Hopping Spread Spectrum (FHSS)

An early implementation of the spread spectrum concept. This wireless access technology transmits data in a series while constantly changing the frequency in use.


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A means or method of communication that occurs over multiple frequencies at the same time. Telecommunications techniques in which a signal is transmitted in a bandwidth considerably greater than the frequency content of the original information. Frequency hopping, direct sequence spreading, time scrambling, and combinations of these techniques are forms of spread spectrum.
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Any software that covertly gathers user information through the user’s Internet connection without his or her knowledge, usually for advertising purposes. Spyware applications are typically bundled as a hidden component of freeware or shareware programs that can be downloaded from the Internet; however, it should be noted that the majority of shareware and freeware applications do not come with spyware. Once installed, the spyware monitors user activity on the Internet and transmits that information in the background to someone else. Spyware can also gather information about email addresses and even passwords and credit card numbers. Also known as adware. Software that monitors your actions and transmits important details to a remote system that spies on your activity. Sometimes used for malicious and illicit purposes, such as identity theft or account takeover.
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Family of IEEE standards for wireless LANs first introduced in 1997. The first standard to be implemented, 802. 11b, specifies from 1 to 11 Mbps in the unlicensed band using DSSS (direct sequence spread spectrum) technology. The Wireless Ethernet Compatibility Association (WECA) brands it as Wireless Fidelity (WiFi).
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Permits the active or passive transfer of information between separated points without physical connection. Active information transfer may entail a transmit and/or receive emanation of energy, whereas passive information transfer entails a receiveonly capability. Currently wireless technologies use IR, acoustic, RF, and optical but, as technology evolves, wireless could include other methods of transmission.
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A wireless network that uses a wireless access point to connect wireless clients together, but does not offer any access to a wired network.
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