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chipping code). The longer the chip, the greater the probability that
the original data can be recovered. Even if one or more bits in the
chip are damaged during transmission, statistical techniques
embedded in the radio can recover the original data without the
need for retransmission. To an unintended receiver, DSSS appears
as low power wideband noise and is rejected (ignored) by most
narrowband receivers.
Question
Would the information be intercepted while transmitting on air?
Answer
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.
Question
What is WEP?
Answer
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.
Question
What is infrastructure mode?
Answer
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.
Question
What is roaming?
Answer
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.
Question
What is ISM band?
Answer
The FCC and their counterparts outside of the U.S. have set aside
bandwidth for unlicensed use in the ISM (Industrial, Scientific and
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