WD752-BD-N
150Mbps Wireless Lite N USB Adapter
- 40 -
Spread Spectrum -
Spread Spectrum technology is a wideband radio frequency technique
developed by the military for use in reliable, secure, mission-critical communications systems. It is
designed 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, provided 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).
SSID -
A
S
ervice
S
et
Id
entification is a thirty-two character (maximum) alphanumeric key
identifying a wireless local area network. For the wireless devices in a network to communicate
with each other, all devices must be configured with the same SSID. This is typically the
configuration parameter for a wireless PC card. It corresponds to the ESSID in the wireless
Access Point and to the wireless network name.
WEP
(
W
ired
E
quivalent
P
rivacy)
-
A data privacy mechanism based on a 64-bit or 128-bit shared
key algorithm, as described in the IEEE 802.11 standard.
Wi-Fi -
A trade name for the 802.11b wireless networking standard, given by the Wireless
Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry standards group
promoting interoperability among 802.11b devices.
WLAN
(
W
ireless
L
ocal
A
rea
N
etwork) - A group of computers and associated devices
communicate with each other wirelessly, which network serving users are limited in a local area.
WPA
(
W
i-Fi
P
rotected
A
ccess)
-
A wireless security protocol use TKIP (Temporal Key Integrity
Protocol) encryption, which can be used in conjunction with a RADIUS server.
