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2. Data communication - Wikipedia

   en.wikipedia.org/wiki/Data_communication

   Data communication, including data transmission and data reception, is the transfer of data, transmitted and received over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires , optical fibers , wireless communication using radio spectrum , storage media and computer buses .

3. Comparison of synchronous and asynchronous signalling

   en.wikipedia.org/wiki/Comparison_of_synchronous...

   (the START bit), waits 'half a bit duration' and then reads the value of the signal. A further delay of one 'whole bit duration' is executed before the next data bit is 'read' - repeating for the length of the whole serial word (typically 7/8-data bits). An optional PARITY bit follows the data bits and precedes the stop bit(s).

4. Error detection and correction - Wikipedia

   en.wikipedia.org/wiki/Error_detection_and_correction

   The output of a cryptographic hash function, also known as a message digest, can provide strong assurances about data integrity, whether changes of the data are accidental (e.g., due to transmission errors) or maliciously introduced. Any modification to the data will likely be detected through a mismatching hash value.

5. Signal transmission - Wikipedia

   en.wikipedia.org/wiki/Signal_transmission

   In telecommunications, transmission (sometimes abbreviated as "TX") is the process of sending or propagating an analog or digital signal via a medium that is wired, wireless, or fiber-optic. [ 1 ] [ 2 ]

6. Long-range optical wireless communication - Wikipedia

   en.wikipedia.org/wiki/Long-range_optical...

   Long-range optical wireless communication or free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking over long distances. "Free space" means air, outer space, vacuum, or something similar.

7. Digital Signal 3 - Wikipedia

   en.wikipedia.org/wiki/Digital_Signal_3

   Digital Signal 3 (DS3 or T3 line) is a digital signal level 3 T-carrier.The data rate for this type of signal is 44.736 Mbit/s (45 Mb). It can transport 28 DS1 level signals within its payload.

8. Frame (networking) - Wikipedia

   en.wikipedia.org/wiki/Frame_(networking)

   In the OSI model of computer networking, a frame is the protocol data unit at the data link layer. Frames are the result of the final layer of encapsulation before the data is transmitted over the physical layer. [1] A frame is "the unit of transmission in a link layer protocol, and consists of a link layer header followed by a packet."

9. Remote data transmission - Wikipedia

   en.wikipedia.org/wiki/Remote_data_transmission

   When remote data transmission began, data were exchanged by the use of diskettes, magnetic tape, punched tape and dispatched via courier (the so-called sneaker net).. In the beginning, electronic remote data transmission was also accomplished through special adapters on special data or telex lines, teleprinter, serial ports, and analog telephone] or over simple radio connections.