TD-W8970N
Wireless N ADSL2+ Modem Router User Guide
Appendix D: Glossary
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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.
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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.
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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.
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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.
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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.
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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.
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AES
(
A
dvanced
E
ncryption
S
tandard)
-
A security method that uses symmetric 128-bit block
data encryption.
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ACS
(
A
uto-
C
onfiguration
S
erver)
-
Through
ACS
(Auto-Configuration Server) you can
perform auto-configuration, provision, collection, and diagnostics to the device.
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ATM
(
A
synchronous
T
ransfer
M
ode)
-
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.
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Bridging -
A device that connects different networks.
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Browser -
An application program that provides a way to look at and interact with all the
information on the World Wide Web.
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