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Titlebook: Computer Communications and Networks; John R. Freer Book 1988 J R Freer 1988 Counter.LAN.Modem.Modulation.Multiplexer.Switching.analog.com

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发表于 2025-3-21 19:43:32 | 显示全部楼层 |阅读模式
书目名称Computer Communications and Networks
编辑John R. Freer
视频videohttp://file.papertrans.cn/234/233527/233527.mp4
丛书名称Applications of Communications Theory
图书封面Titlebook: Computer Communications and Networks;  John R. Freer Book 1988 J R Freer 1988 Counter.LAN.Modem.Modulation.Multiplexer.Switching.analog.com
描述Computer communications is one of the most rapidly developing technologies and it is a subject with which everyone in the computer systems profession should be familiar. Computer communications and networks is an introduction to communications technology and system design for practising and aspiring computer professionals. The subject is described from the computer system designer‘s point of view rather than from the communications engineer‘s viewpoint. The presentation is suitable for introductory reading as well as for reference. The emphasis is on practical, rather than theoretical, aspects and on technology which will become more important in the future. The majority of the subject matter applies to civil and military communications but some aspects which are unique to military applications have been included where considered signifi­ cant. Computer communications is a rapidly changing and highly complex subject. Sufficient practical knowledge of the subject is not usually gained at university or college but is generally developed over a period of several years by trial and error, attending courses, reading reference books and journals; this book attempts to simplify and speed
出版日期Book 1988
关键词Counter; LAN; Modem; Modulation; Multiplexer; Switching; analog; communication; computer; computer communicat
版次1
doihttps://doi.org/10.1007/978-1-4613-1041-9
isbn_softcover978-1-4612-8305-8
isbn_ebook978-1-4613-1041-9
copyrightJ R Freer 1988
The information of publication is updating

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Network topologies, switching and access control,viewed by the user as one large computer system which allocates jobs without user intervention. A computer communication network is viewed as a collection of several computer systems from which the user can select the service required and communicate with any computer as a local user.
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Computing and software issues, at high speed over long distances first made remote computer terminals possible and later led to distributed data processing. The needs of distributed data processing systems with satellite processors determined the architecture of many communications networks.
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Threats to communications security,m, is vulnerable only to the entry of unauthorised users and users gaining access to information which they are not authorised to receive. These security risks may be reduced by an efficient means of user identification and control on access to the computer room, plus a system of access controls for
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https://doi.org/10.1007/978-1-0716-3629-9ive needles which pointed to the letters of the alphabet. The first machine to use serial binary data communication was the teleprinter, developed by Emil Baudot in 1874. The Baudot Code uses five bits to represent the letters of the alphabet and a figures shift character, after which code combinati
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