Tp-Link TL-WN651G Инструкция по эксплуатации онлайн [35/35] 3937

TL-WN610G/TL-WN650G/TL-WN651G 108M Wireless Adapter User Guide

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).

¾ 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.

¾ 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

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.

¾ Spread Spectrum - Spread Spectrum technology is a wideband radio frequency technique

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

systems. It is designed to trade off bandwidth efficiency for reliability, integrity, and security.

In other words, more bandwidth is consumed than in the case of narrowband transmission,

but the trade off produces a signal that is, in effect, louder and thus easier to detect,

provided that the receiver knows the parameters of the spread-spectrum signal being

broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum signal looks

like background noise. There are two main alternatives, Direct Sequence Spread Spectrum

(DSSS) and Frequency Hopping Spread Spectrum (FHSS).

¾ SSID - A Service Set Identification is a thirty-two character (maximum) alphanumeric key

identifying a wireless local area network. For the wireless devices in a network to

communicate with each other, all devices must be configured with the same SSID. This is

typically the configuration parameter for a wireless PC card. It corresponds to the ESSID in

the wireless Access Point and to the wireless network name.

¾ WEP (Wired Equivalent Privacy) - A data privacy mechanism based on a 64-bit or 128-bit

or 152-bit shared key algorithm, as described in the IEEE 802.11 standard.

¾ W

i-Fi - A trade name for the 802.11b wireless networking standard, given by the Wireless

Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry standards

group promoting interoperability among 802.11b devices.

¾ WLAN (Wireless Local Area Network) - A group of computers and associated devices

communicate with each other wirelessly, which network serving users are limited in a local area.

¾ WPA (Wi-Fi Protected Access) - A wireless security protocol use TKIP (Temporal Key Integrity

Protocol) encryption, which can be used in conjunction with a RADIUS server.