Labels:text | screenshot | font OCR: n the beginning there was Xmodem, and file transfer was without form and void. Xmodem was the first of the common file transfer protocols. Xmodem transfers the file in small packets of 128 bytes each. After each packet, Xmodem performs a check to insure that the packet was transferred correctly. You can tell when Xmodem is performing this check if you have an external modem because the lights indicating RD or SD (depending on if you are sending or receiving) stop flashing for an instant. That instant (actually a substantial part of a second) represents dead time as far as the transfer is concerned because no data is being transferred while Xmodem is performing the packet check.
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