Choreography
发表于 2025-3-30 11:55:55
Asynchronous communications: RS-232,ial interfaces between the DTE (the computer) and the peripheral. Typical implementations include serial mouse, printers, plotters, accessing remote instrumentation, scanners, digitizers and modems. In 1978 the EIA updated the original standard with a new one called RS-232D.
Congregate
发表于 2025-3-30 15:26:45
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肿块
发表于 2025-3-30 16:52:22
Error control,uest a retransmission or discard the data. With error correction the receiver detects an error and tries to correct as many error bits as possible. Again, the more error coding bits used the more bits can be corrected. An error correction code is normally used when the receiver cannot request a retransmission.
WAIL
发表于 2025-3-30 21:39:37
Book 1996f the countries and the peoples of the world. Without it many industries could not exist. It is the objective of this book to discuss data communications in a readable form that students and professionals all over the world can understand. As much as possible the text uses dia grams to illustrate k
知识分子
发表于 2025-3-31 01:04:12
Hermeneutics and Critical Theoryhe noise will not affect the recovered signal. Even if the noise is greater than this threshold there are techniques which can reduce its effect. One method is to add extra bits to the data to either detect errors or even to correct the bits in error.
连锁,连串
发表于 2025-3-31 05:54:39
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吞没
发表于 2025-3-31 10:06:14
X-Windows,ns are selected using menus. Rather than entering commands from the keyboard a mouse pointer is normally used to select objects. This usage of Windows, Icons, Menus and Pointers (WIMPs) is typically known as a Graphical User Interface (GUI).
synovial-joint
发表于 2025-3-31 17:15:22
https://doi.org/10.1057/9780230601802ns are selected using menus. Rather than entering commands from the keyboard a mouse pointer is normally used to select objects. This usage of Windows, Icons, Menus and Pointers (WIMPs) is typically known as a Graphical User Interface (GUI).
侧面左右
发表于 2025-3-31 19:06:43
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Dedication
发表于 2025-4-1 01:26:49
nd future key data communications technologies, including: • Data Communications Standards and Models; • Local Area Networks (Ethernet, Token Ring and FDDI); • Transmission Control ProtocollInternet Protocol (TCPIIP); • High-level Data Link Control (HDLC); • X.25 Packet-switching; • Asynchronous Communication978-0-412-75430-2978-1-4613-1207-9