|
Piggybacking on Internet access is the practice of establishing a wireless Internet connection by using another subscriber's wireless Internet access service without the subscriber's explicit permission or knowledge. It is a legally and ethically controversial practice, with laws that vary by jurisdiction around the world. While completely outlawed or regulated in some places, it is permitted in others. A customer of a business providing hotspot service, such as a hotel or café, is generally not considered to be piggybacking, though non-customers or those outside the premises who are simply in reach may be. Many such locations provide wireless Internet access as a free or paid-for courtesy to their patrons or simply to draw people to the area. Others near the premises may be able to gain access. Piggybacking is distinct from wardriving, which involves only the logging or mapping of the existence of access points. ==Background== Piggybacking has become a widespread practice in the 21st century due to the advent of wireless Internet connections and Wireless access points. Computer users who either do not have their own connections or who are outside the range of their own might find someone else's by wardriving or luck and use that one. However, those residing near a hotspot or another residence with the service have been found to have the ability to piggyback off such connections without patronizing these businesses, which has led to more controversy. While some may be in reach from their own home or nearby, others may be able to do so from the parking lot of such an establishment, from another business that generally tolerates the user's presence, or from the public domain. Others, especially those living in apartments or town houses, may find themselves able to use a neighbour's connection. Wi-Fi hotspots (unsecured and secured) have already been recorded (to some degree) with GPS-coordinates. Sites such as (Wigle.net ) and (WifiMaps ) provide this information. Long range antennas can be hooked up to laptop computers with an external antenna jack - these allow 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. While 2.4 and 5.8 GHz antennas are commercially available and easily purchased from many online vendors, they are also relatively easy to make. Laptops and tablets that lack external antenna jacks can rely on external Wi-Fi modems with radios - many requiring only USB or Power over Ethernet (PoE) power connections which the laptop can itself easily provide from its own battery. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Piggybacking (Internet access)」の詳細全文を読む スポンサード リンク
|