喝水 发表于 2025-3-21 19:43:32
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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.Blasphemy 发表于 2025-3-22 05:37:54
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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.婚姻生活 发表于 2025-3-22 17:10:12
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 forArthropathy 发表于 2025-3-23 00:30:49
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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