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Definition: hotspot

(1) The range of a wireless (Wi-Fi) network. See Wi-Fi hotspot.

(2) The part of a graphic on a Web page that serves as a link to a website, another page or file. When the hotspot area is clicked or tapped, the link is executed or an explanation is displayed. The more the hotspot occupies the entire image area, the easier it is to select. However, very often, the hotspot is only a small area within the image. See hypergraphic and image map.

The Hotspot Location
The hotspot comprises the actual pixels that the cursor makes contact with on the graphic. In this example, the hotspot does not occupy the entire image area, but when the cursor moves into the hotspot, the arrow switches to a hand.

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

(4) The instructions in a program that are executed more than all the other instructions. To improve performance, the hotspots are the routines that should be refined. A Java compiler aptly named Hotspot optimizes the parts of the program that are executed most frequently.

(5) (hot spot) An area with excessive heat in the datacenter. Hot spots are typically found near server racks that are not cooled properly. Contrast with "cold spot," which is an area that is too cool, often because it is near air conditioning vents.