Nexxt Solutions SAROS300 ユーザーズマニュアル

Nexxt Solutions  -  SAROS - Wireless N PCI-E Adapter

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802.11 A family of specifications developed by the IEEE for WLAN technology. 

802.11a An extension of 802.11 WLAN standards that provides up to 54 Mbps transmission 

in the 5 GHz UNI radio band. 

802.11b An extension of the 802.11 WLAN standard that provides up to 11 Mbps of 

transmission in the 2.4 GHz ISM radio band. 802.11b uses DSSS modulation.

802.11g An extension of the 802.11 WLAN standard that provides up to 54 Mbps of 

transmission in the 2.4 GHz ISM radio band. 802.11g uses OFDM modulation and is 

backwards compatible with 802.11b. 

802.11n A higher transmission rate, supports Multi-Input Multi-Output (MIMO) technology. 

WEP Wired Equivalent Privacy. A security protocol for WLANs defined in the IEEE 802.11 

standard. 

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 of retransmission. To an unintended receiver, DSSS 

appears as low power wideband noise and is rejected (ignored) by most narrowband receiv-

ers. 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). 

ICS Microsoft Internet Connection Sharing enables multiple computers to share access to the 

Internet via one PC.

Infrastructure Network - An infrastructure network is a group of computers or other de-

vices, 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. 

RSN Robust Security Network. A substitute for WPA, and it adopts the 802.1x standard and 

advanced encryption. 

Spread Spectrum - Spread Spectrum technology is a wideband radio frequency technique 

developed by the military for use in reliable, secure, mission-critical communications systems.