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Appendix G. Glossary
61200305L1-1 ATLAS 550 User Manual G-11
each block and the result is sent along with the block. If the result does not check out at the other end,
the computer at the other end sends a request (a NAK-negative acknowledgment) to retransmit that
block again. If the block checks out, the computer send ACK (an acknowledgment). In this way, rela-
tively error-free transmissions can be accomplished.