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Out-of-band data : ウィキペディア英語版 | Out-of-band data In computer networking, out-of-band data is the data transferred through a stream that is independent from the main ''in-band'' data stream. An out-of-band data mechanism provides a conceptually independent channel, which allows any data sent via that mechanism to be kept separate from in-band data. The out-of-band data mechanism should be provided as an inherent characteristic of the data channel and transmission protocol, rather than requiring a separate channel and endpoints to be established.〔(【引用サイトリンク】title=Out of band data, TCPUrgent mode and overlapped I/O )〕 The term "out-of-band data" probably derives from out-of-band signaling, as used in the telecommunications industry.〔(【引用サイトリンク】url=http://mason.gmu.edu/~afinn/html/tele/tech%20chapters/T11.htm )〕 ==Example case== Consider a networking application that tunnels data from a remote data source to a remote destination. The data being tunneled may consist of any bit patterns. The sending end of the tunnel may at times have conditions that it needs to notify the receiving end about. However, it cannot simply insert a message to the receiving end, because that end will not be able to distinguish the message from data sent by the data source. But using an out-of-band mechanism, the sending end can send the message to the receiving end out of band. The receiving end will be notified in some fashion of the arrival of out-of-band data, and it can read the out of band data and know that this is a message intended for it from the sending end, independent of the data from the data source.
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「Out-of-band data」の詳細全文を読む
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