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(1) The geographic boundary covered by a Wi-Fi (802.11) wireless access point. Typically set up for Internet access, anyone entering the hotspot with a Wi-Fi-based laptop, PDA or smartphone can connect to the Internet, providing the access point is configured to advertise its presence (beaconing) and authorization is not necessary. If authorization is required, the user must know the password. In addition to Internet access, all shared folders on everyone's computer in the network are also accessible.

The Network Name May Be Hidden
An access point is invisible if it is not advertising its presence (not beaconing). To gain access, a user must know the network name (see SSID) and most likely the password as well.

Public Hotspots
According to JWire, Inc., at the end of 2009, there were more than a quarter million public hotspots around the world. However, every home or business Wi-Fi network is a hotspot, and if the wireless router is left in its default state, which is to advertise its presence and not require a password, it too is inadvertently a public hotspot.

     Following are some of the Web sites that report the whereabouts of public hotspots. Contrast with notspot. See hotspot finder, Wi-Fi, access point, mobile hotspot, war driving and Muni Wi-Fi.
www.hotspot-locations.com
www.jiwire.com
www.wi-fihotspotlist.com
www.wififreespot.com
www.wifinder.com


(2) An icon or part of a larger image used as a hyperlink to another document or file. When the hotspot is clicked, the linked material is searched for and displayed.

(3) The exact part of an icon or screen pointer that is sensitive to selection. A hotspot may be part of a larger image. For example, an image may have several hotspots, one for each of its components. When clicked, a greater explanation of the component is produced. Where hotspots begin and end determine how easy they are to select.

     The screen pointer also has a hotspot, which is a small number of pixels that make contact with the icon's hotspot. For example, the tip of an arrow or finger pointer or the crosspoint of an X-shaped pointer may be the pointer's hotspot.

(4) A network node that is processing at its maximum or is backlogged due to an excessive number of transactions.

(5) The instructions in a program that are executed the most in actual operation. To improve execution performance, the hotspots are the routines that should be refined.

(6) (HotSpot) A Java compiler from Sun that optimizes the parts of the program that are executed most frequently (the hotspots).
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