Trying to learn how to translate from the human translation examples.
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the testerpresent service is used by the tester to indicate to the server that it is still present, in order to prevent the server from automatically returning to normal operation and possibly stopping the communication.
el servicio testerpresent lo utiliza el verificador para indicar al servidor que sigue presente, con el fin de evitar que éste retorne automáticamente al funcionamiento normal y, posiblemente, interrumpa la comunicación.