MicroNet Technology SP907NL - Manual (Page 49)

46
9. What is AES?
AES (Advanced Encryption Standard), a chip-based security, has been developed
to ensure the highest degree of security and authenticity for digital information,
while making more efficient use of hardware and/or software than previous
encryption standards. It is also included in IEEE 802.11i standard. Compare with
AES, TKIP is a temporary protocol for replacing WEP security until manufacturers
implement AES at the hardware level.
10. Can Wireless products support printer sharing?
Wireless products perform the same function as LAN products. Therefore,
Wireless products can work with Netware, Windows 2000, or other LAN operating
systems to support printer or file sharing.
11. 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 series offer the encryption function (WEP)
to enhance security and Access Control. Users can set it up depending upon their
needs.
12. What is DSSS? What is FHSS? What are their differences?
Frequency-hopping spread-spectrum (FHSS) uses a narrowband carrier that
changes frequency in a pattern that is known to both transmitter and receiver.
Properly synchronized, the net effect is to maintain a single logical channel. To an
unintended receiver, FHSS appears to be short-duration impulse noise. Direct-
sequence spread-spectrum (DSSS) generates a redundant bit pattern for each bit
to be transmitted. This bit pattern is called a chip (or chipping code). The longer the
chip is, 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.