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Long range antennas can be hooked up to laptop computers with an external antenna jack, which allows a user to pick up a signal from as far as several kilometers away. Since unsecured wireless signals can be found readily in most urban areas, laptop owners may find free or open connections almost anywhere.
The public can use a laptop or other suitable portable device to access the wireless connection (usually Wi-Fi) provided.The iPass 2014 interactive map, that shows data provided by the analysts Maravedis Rethink, shows that in December 2014 there are 46,000,000 hotspots worldwide and more than 22,000,000 roamable hotspots.
Many smartphones have a built-in mobile hotspot capability of this sort, though carriers often disable the feature, or charge a separate fee to enable it. Standalone devices such as MiFi- and WiBro-branded devices provide the capability. Some laptops that have a cellular modem card can also act as mobile Internet Wi-Fi access points.
IEEE 802.11u-2011 is an amendment to the IEEE 802.11-2007 standard to add features that improve interworking with external networks.. 802.11 is a family of IEEE technical standards for mobile communication devices such as laptop computers or multi-mode phones to join a wireless local area network (WLAN) widely used in the home, public hotspots and commercial establishments.
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