Bedienungsanleitung TP-LINK TL-WN781ND (Seite 52 von 52) (Englisch)

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TL-WN781ND 150Mbps Wireless N PCI Express Adapter User Guide

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. See also Wireless Network

Name and ESSID.

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. To gain access to a

WEP network, you must know the key. The key is a string of characters that you create.

When using WEP, you must determine the level of encryption. The type of encryption

determines the key length. 128-bit encryption requires a longer key than 64-bit encryption.

Keys are defined by entering in a string in HEX (hexadecimal - using characters 0-9, A-F) or

ASCII (American Standard Code for Information Interchange – alphanumeric characters)

format. ASCII format is provided so you can enter a string that is easier to remember. The

ASCII string is converted to HEX for use over the network. Four keys can be defined so that

you can change keys easily.

¾ Wi-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 uses TKIP (Temporal Key

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

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