TP-Link TL-WN551G - Manual (Page 25)

TL-WN510G/TL-WN550G/TL-WN551G 54M Wireless Adapter User Guide
Appendix B: Glossary
2x to 3x eXtended Range
TM
WLAN Transmission Technology - The WLAN device
with 2x to 3x eXtended Range
TM
WLAN transmission technology make its sensitivity
up to 105 dB, which gives users the ability to have robust, longer-range wireless
connections. With this range-enhancing technology, a 2x to 3x eXtended Range
TM
based client and access point can maintain a connection at as much as three times
the transmission distance of traditional 802.11b and 802.11g products, for a coverage
area that is up to nine times greater. A traditional 802.11b and 802.11g product
transmission distance is about 300m, A TP-LINK 2x to 3x eXtended Range
TM
based
client and access point can maintain a connection transmission distance may be up
to 830m.
802.11b - The 802.11b standard specifies a wireless product networking at 11 Mbps
using direct-sequence spread-spectrum (DSSS) technology and operating in the
unlicensed radio spectrum at 2.4GHz, and WEP encryption for security. 802.11b
networks are also referred to as Wi-Fi networks.
802.11g - specification for wireless networking at 54 Mbps using direct-sequence
spread-spectrum (DSSS) technology, using OFDM modulation and operating in the
unlicensed radio spectrum at 2.4GHz, and backward compatibility with IEEE 802.11b
devices, and WEP encryption for security.
Ad-hoc Network - An ad-hoc network is a group of computers, each with a wireless
adapter, connected as an independent 802.11 wireless LAN. Ad-hoc wireless
computers operate on a peer-to-peer basis, communicating directly with each other
without the use of an access point. Ad-hoc mode is also referred to as an
Independent Basic Service Set (IBSS) or as peer-to-peer mode, and is useful at a
departmental scale or SOHO operation.
DSSS (Direct-Sequence Spread Spectrum) - DSSS generates a redundant bit
pattern for all data transmitted. This bit pattern is called a chip (or chipping code).
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
for 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).
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.
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
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