Planet WL-3560 Инструкция по эксплуатации онлайн [19/19] 65789

changed or dynamically assigned by the network, the MAC address of a networking

device is permanent.

ü What is WEP?

Wired Equivalent Privacy (WEP) is a type of data encryption mechanism described in

the IEEE 802.11 standard.

ü Could I implement the driver/utility installations on another operating system, e.g.

Windows 98SE, 2000 and ME? Are there any differences of driver/utility installa-

tions among these different operating systems?

Yes, you can. All the installation mentioned in this user’s manual could be implemented

on Windows 98SE/ME/200/XP and there will be no difference.

ü Can Wireless products support printer sharing?

Wireless products perform the same function as LAN products. Therefore, Wireless

products can work with Netware, Windows NT/2000/XP, or other LAN operating sys-

tems to support printer or file sharing.

ü What is DSSS？What is FHSS？And 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 synchro-

nized, 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, 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.

ü What is Spread Spectrum?

Spread Spectrum technology is a wideband radio frequency technique developed by the

military for use in reliable, secure, mission-critical communication systems. It is de-

signed to trade off bandwidth efficiency for reliability, integrity, and security. In other

words, more bandwidth is consumed than in the case of narrowband transmission, but

the trade off produces a signal that is, in effect, louder and thus easier to detect, pro-

vided that the receiver knows the parameters of the spread-spectrum signal being

broadcast. If a receiver is not tuned to the right frequency, a spread –spectrum signal

looks like background noise. There are two main alternatives, Direct Sequence Spread

Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).