|
BLAST (BLocked ASynchronous Transmission), like XMODEM, is a communications protocol designed for file transfer over asynchronous communication ports and dial-up modems that achieved some popularity during the 1980s.〔Held, Gilbert "Understanding Data Communications: From Fundamentals to Networking", Wiley, 1991. ISBN 978-0-4719305-1-8〕〔(【引用サイトリンク】title=Honig, David A. & Hoover, Kenton A. "Desktop Communications: IBM PC, PS/2 & Compatibles", Wiley, 1990. ISBN 0-471-60613-8 )〕 Reflecting its status as a de facto standard for such transfers, BLAST, along with XMODEM, was briefly under official consideration by ANSI in the mid-80s as part of that organization's ultimately futile attempt to establish a single de jure standard. == Overview == BLAST grew out of the mission-critical experience of providing air pollution telemetry within the dial-up communications environment of the petroleum belt of southern Louisiana and Texas, with not only noisy telephone lines but also unexpected satellite hops to remote locations.〔Smith, G. W. "Aesthetic Wilderness: A Brief Personal History of the Meeting Between Art and the Machine", Birds-of-the-Air Press, 2011. ISBN 978-0-9846655-1-8〕〔Estill, Lyle "Small is Possible: Life in a Local Economy", New Society Publishers, 2008. ISBN 978-0-86571-603-2〕 As such, BLAST was the only asynchronous protocol to have entered the 1980s computing arena with all of the following features: * bit-oriented data encoding * CRC (cyclic redundancy check) error detection * a sliding window block transmission scheme * selective retransmission of corrupted blocks * simultaneous bi-directional data transfer BLAST thus gained a reputation as the protocol having the best combination of speed and reliability in its class.〔〔〔Crabb, Don (February 21, 1989). "MacBLAST carves a place for itself in communications applications". MacWEEK.〕〔Smith, G. W. & Rubenstein, P. (1984). "The Async Route -- Best Suited for a Microcomputer's Local Traffic". Data Communications.〕 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「BLAST (protocol)」の詳細全文を読む スポンサード リンク
|