protocol A file transfer protocol with error checking and

crash recovery. Developed by Chuck Forsberg. Its transfer

rate is similar to YMODEM-g. Like YMODEM-g, ZMODEM does not

wait for positive acknowledgement after each block is sent,

but rather sends blocks in rapid succession. If a ZMODEM

transfer is cancelled or interrupted for any reason, the

transfer can be resurrected later and the previously

transferred information need not be resent.