Summary

8 IT Essentials: PC Harware and Software Companion Guide■■Enable security on home networks.Use Wi-Fi Protected Access (WPA) security.Wi-Fi Protected Access standards (WPA, WPA2) are used to secure Wi-Fi networks. WPAuses a sophisticated encryption and authentication technology to protect data flow betweenWi-Fi devices. WPA uses a 128-bit encryption key and should be enabled on all wirelessdevices. WPA was introduced to replace wired equivalent privacy (WEP), which had knownsecurity issues.Describe Satellite TechnologySatellite technology service is ideal for rural or remote users who require high-speed broadbandaccess in areas where no other high-speed services are available. However, because ofthe higher initial cost and relatively slower speeds, high-speed satellite network connectionsare recommended only if a cable or Digital Subscriber Line (DSL) connection is unavailable.Common satellite characteristics include the following:■■■■Satellite networks are faster than dialup connections but are slower than cable and DSLconnections.Satellite service is ideal for the rural or remote Internet users.Downloading files is faster than uploading files.Adverse weather conditions can interfere with satellite reception.Satellite Internet connections use two-way data channels. One channel is used for uploadingand another for downloading. Both download and upload can be accomplished using asatellite connection. In some cases, a telephone line and modem are used for the upload.Download speeds typically are in the 500-kbps range, and uploads are about 50 kbps, makingthis an asymmetrical connection similar to DSL. Satellite connections are slower thancable or DSL connections but are faster than telephone modem connections. Some advantagesof connecting by satellite are as follows:■■■Two-way, high-speed Internet access, available in rural and remote areasQuick file downloadsSatellite dish may also be used for TV accessProper placement, installation, and configuration of a satellite system are important for thesystem to work effectively. Even if you point the satellite dish toward the equator, wheremost satellites orbit the Earth, obstructions and adverse weather can still interfere with signalreception.