TP-LINK TD-W8950ND User Manual

Page of 108
TD-W8950ND
  150Mbps Wireless N ADSL2+ Modem Router User Guide
 
Appendix D: Glossary 
¾
  802.11n - 802.11n builds upon previous 802.11 standards by adding MIMO (multiple-input 
multiple-output). MIMO uses multiple transmitter and receiver antennas to allow for increased 
data throughput via spatial multiplexing and increased range by exploiting the spatial diversity, 
perhaps through coding schemes like Alamouti coding. The Enhanced Wireless Consortium 
(EWC) [3] was formed to help accelerate the IEEE 802.11n development process and 
promote a technology specification for interoperability of next-generation wireless local area 
networking (WLAN) products. 
¾
  802.11b - The 802.11b standard specifies a wireless 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. 
¾
  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. 
¾
  2x to 3x eXtended Range™ WLAN Transmission Technology - The WLAN device 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 connections. With this 
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, 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 2x to 3x 
eXtended Range™ based client and access point can maintain a connection transmission 
distance may be up to 830m. 
¾
  Access Point - A device that allows wireless-equipped computers and other devices to 
communicate with a wired network. Also used to expand the range of a wireless network. 
¾
  Ad-hoc Network - An ad-hoc network is a group of computers, each with a wireless adapter, 
connected as an independent IEEE 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. 
¾
  AES (Advanced Encryption Standard) - A security method that uses symmetric 128-bit block 
data encryption. 
¾
  ACS  (Auto-Configuration  Server) - Through  ACS (Auto-Configuration Server) you can 
perform auto-configuration, provision, collection, and diagnostics to the device.   
¾
  ATM  (Asynchronous  Transfer  Mode)  - ATM is a cell based transfer mode that requires 
variable length user information to be segmented and reassembled to/from short, fixed length 
cells. It uses two different methods for carrying connectionless network interconnect traffic, 
routed and bridged Protocol Data Units (PDUs), over an ATM network. 
¾
  Bridging - A device that connects different networks. 
¾
  Browser - An application program that provides a way to look at and interact with all the 
information on the World Wide Web. 
96