Appendix G. Glossary

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.

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ADTRAN 550 user manual Appendix G. Glossary