Topical Terminology > Xmodem
Xmodem
For Xmodem we have terms and definitions in 2 topics. The topics are Technology and Telecommunications.
Xmodem (Technology) 
A file transfer protocol used in asynchronous communications that transfers information in blocks of 128 bytes.
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Xmodem (Telecommunications)
A file transfer protocol developed by Ward Christensen around 1977. It is fairly slow by today's standards, but was the first widespread file transfer protocol. It uses blocks of 128 bytes, and after each block is sent, it sends a 1 byte checksum to check for errors. If an error is encountered, the block will be re-sent. Almost every communications program offers this protocol.
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