Communication that takes place over a network between a single sender and the nearest of a group of receivers.
Anycast is used in IPv6 as a method of updating routing tables. One host initiates an update of a router table for a group of hosts, sending the data to the nearest host. That host then sends the message on to its nearest router until all the routing tables in that group are updated.
Compare with multicast and unicast.
A device that controls the amount of light admitted through an opening. In photography and digital photography, aperture is the unit of measurement that defines the size of the opening in the lens that can be adjusted to control the amount of light reaching the film or digital sensor. The size of the aperture is […]
In satellite communications, most satellites orbit the earth in elliptical patterns with the earth not in the exact center of the orbital pattern. When a satellite is at its furthest point from the earth, it is at the apogee of the orbit. When a satellite is at its closest point to the earth, it is […]
Short for application. A killer app, for example, is an application that surpasses (i.e., kills) its competitors.
To add something at the end. For example, you can append one file to another or you can append a field to a record. Do not confuse append with insert. Append always means to add at the end. Insert means to add in between.
A program designed to be executed from within another application. Unlike an application, applets cannot be executed directly from the operating system. With the growing popularity of OLE(object linking and embedding), applets are becoming more prevalent. A well-designed applet can be invoked from many different applications. Web browsers, which are often equipped with Java virtual […]