Wireless Multi-Function Access Point
A02-AP-W54 Pag. 37
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 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.
