An acronym for SUMmation CHECK. In data communications, an error-checking technique in which the number of bits in a unit of data is summed, transmitted along with the data, and checked by the receiving computer. If the sum differs, an error probably occurred in transmission and the transmission is repeated. A commonly used personal computer communications protocol called XMODEM uses the checksum technique. In some virus scanning and file integrity software checksums are calculted for every file in a directory and the results are stoed in the directory. When the program is scanningm it compares the checksum information stored in the directory with the current checksum for each scanned file. A difference in the sum may indicate that the file has been infected by a virus that doesn't leave a recognised signature.
To ensure the integrity of the transmitted information.
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A checksum is used solely to see if a file has changed or to see if two files contain exactly the same data. The chances of two different files having the same checksum is very, very small. If you change a file in any way, even by one byte, the checksum will change.
A checksum (also known as a hash sum) is a small size datum computed from a block of digital data. One would use a checksum to detect errors that could have been introduced during storage.
time to live
The scope of work and the educational requirements are the difference between data communication and data communication information.
data communication link
to secure analog data is called scrambling in data communication
They are both forms of communication They are both a form of communication; data communication is a subset of telecommunication, telecommunication send data between two links by means of electromagnetic. (Like satellite), while data communication means send data by telecommunication, it consists of codes of 0's and 1's. In computer means, Data communication is digital data and telecommunication is equipped to send digital data to receiver.
In digital communication we talk about signal while in data communication we talk about data and the could be in the form of packets or frames.
application of multiplexing in data communication
What is the difference between data communication and telecommunication ?
PS2 game CDs have a checksum value of zero in several blocks on the disc where consumer CD burners normally cannot write, and certainly cannot write data that will produce a zero checksum.