The use of the word "band" in "out-of-band" originates from the term as used in radio and other electronic communications.
Here are some very basic examples:
In computer administration, out-of-band management refers to system console access provided, even in the event of primary network subsystem (hard and/or software) failure. This can be done via a console server or with a remote access card (RAC) which has its own processor, memory, battery, network connection, and access to the system bus.
The term "out-of-band" is sometimes confused with the term "out-of-bounds", which in computer programming refers to values returned by a function that are not in its "natural" range of return values, but rather signal some kind of exception. Many C programming language functions that normally return a non-negative integer will return -1 to indicate failure. (See also end-of-file) It is actually a clear example of in-band signalling since it uses the same "channel" for control and data (In-band signaling is the opposite of out-of-band signaling and out-of-band signaling is one method of achieving network transparency.)
Altered books need out-of-bounds ideas ; The Rockport Library and Center for Maine Contemporary Art create an event using old books.
Oct 17, 2007; ISAAC KESTENBAUM News Assistant -- Portland Press Herald (Maine) 10-17-2007 Altered books need out-of-bounds ideas ; The Rockport...
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