Appendix B: Glossary - TP-Link TL-WN510G User Manual

TL-WN510G/TL-WN550G/TL-WN551G 54M Wireless Adapter User Guide

Appendix B: Glossary

TM
2x to 3x eXtended Range WLAN Transmission Technology - The WLAN device
TM
with 2x to 3x eXtended Range WLAN transmission technology make its sensitivity
up to 105 dB, which gives users the ability to have robust, longer-range wireless
TM
connections. With the range-enhancing technology, a 2x to 3x eXtended Range
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. A traditional
802.11b and 802.11g product transmission distance is about 300m, A TP-LINK 2x to
TM
3x eXtended Range 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
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