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Virtual ISPs A virtual ISP (VISP) is an operation that purchases services from another ISP, sometimes called a wholesale ISP in this context,[47] which allow the VISP's customers to access the Internet using services and infrastructure owned and operated by the wholesale ISP. VISPs resemble mobile virtual network operators and competitive local exchange carriers for voice communications. Free ISPs Free ISPs are Internet service providers that provide service free of charge. Many free ISPs display advertisements while the user is connected; like commercial television, in a sense they are selling the user's attention to the advertiser. Other free ISPs, sometimes called freenets, are run on a nonprofit basis, usually with volunteer staff.[citation needed] Wireless ISP A wireless Internet service provider (WISP) is an Internet service provider with a network based on wireless networking. Technology may include commonplace Wi-Fi wireless mesh networking, or proprietary equipment designed to operate over open 900 MHz, 2.4 GHz, 4.9, 5.2, 5.4, 5.7, and 5.8 GHz bands or licensed frequencies such as 2.5 GHz (EBS/BRS), 3.65 GHz (NN) and in the UHF band (including the MMDS frequency band) and LMDS. reference: 15news.ir 9news.ir afexo.ir aloofile.ir aminpayam.ir andishmes.ir arikehvip.ir azargo.ir bassirat.ir belton.ir birligh.ir brmm.ir chagheri.ir fagups.ir felfeel.ir filegallery.ir fnevis.ir g2pracles.ir harikagap.ir iranspeleo.ir irnhost.ir is20.ir j75.ir kalakalaa.ir kishfairs.ir miadweb.ir moeinazoafa.ir mostak.ir newshap.ir padidefans.ir pears.ir popich.ir popmac.ir ramkaadv.ir rejimkade.ir rezervbambo.ir samatarh.ir seablog.ir serendypaper.ir shikopet.ir sna-kala.ir sobheyasoj.ir takvinarman.ir tepstone.ir topsoftz.ir zanich.ir cssschool.ir jsschool.ir tpitgroup.ir appmail.ir 8host.ir digi220 digi103 seotis.com seotis.ir iransharks