Wireless N Adapter RNX-N250PCe User Manual
Even if one or more bits in the chip are damaged during transmission, statistical
techniques embedded in the receiver can recover the original data without the
need of retransmission. To an unintended receiver, DSSS appears as low power
wideband noise and is rejected (ignored) by most narrowband receivers.
However, to an intended receiver (i.e. another wireless LAN endpoint), the DSSS
signal is recognized as the only valid signal, and interference is inherently
rejected (ignored).
z FHSS - (Frequency Hopping Spread Spectrum) - FHSS continuously changes
(hops) the carrier frequency of a conventional carrier several times per second
according to a pseudo-random set of channels. Because a fixed frequency is not
used, and only the transmitter and receiver know the hop patterns, interception of
FHSS is extremely difficult.
z Infrastructure Network - An infrastructure network is a group of computers or
other devices, each with a Wireless Adapter, connected as an 802.11 wireless
LAN. In infrastructure mode, the wireless devices communicate with each other
and to a wired network by first going through an access point. An infrastructure
wireless network connected to a wired network is referred to as a Basic Service
Set (BSS). A set of two or more BSS in a single network is referred to as an
Extended Service Set (ESS). Infrastructure mode is useful at a corporation scale,
or when it is necessary to connect the wired and wireless networks.
z SSID - A Service Set Identification 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. See also Wireless Network Name and ESSID.
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