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need for retransmission. To an unintended receiver, DSSS appears
as low power wideband noise and is rejected (ignored) by most
narrowband receivers.
Would the information be intercepted while transmitting on air?
WLAN features two-fold protection in security. On the hardware
side, as with Direct Sequence Spread Spectrum technology, it has
the inherent security feature of scrambling. On the software side,
WLAN offers the encryption function (WEP) to enhance security
and access control.
WEP is Wired Equivalent Privacy, a data privacy mechanism based
on a 64-bit or 128-bit shared key algorithm, as described in the
IEEE 802.11 standard.
What is infrastructure mode?
When a wireless network is set to infrastructure mode, the
wireless network is configured to communicate with a wired
network through a wireless access point.
Roaming is the ability of a portable computer user to communicate
continuously while moving freely throughout an area greater than
that covered by a single access point. Before using the roaming
function, the workstation must make sure that it is the same
channel number with the access point of dedicated coverage area.
The FCC and their counterparts outside of the U.S. have set aside
bandwidth for unlicensed use in the ISM (Industrial, Scientific and
Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular,
is being made available worldwide. This presents a truly
revolutionary opportunity to place convenient high-speed wireless
capabilities in the hands of users around the globe.
What is the IEEE 802.11g standard?
Approved in June, 2003 as an IEEE standard for wireless local
area networks (WLANs), 802.11g offers wireless transmission over
