Answer:
The correct answer is problem consensus.
Explanation:
The problem of consensus is a fundamental problem of distributed systems that consists in agreeing to multiple processes on something. It is the problem of finding out how a set of isolated computing processes that can only communicate with messages agree on something. Consensus is easy in the absence of failures but it becomes difficult in intricate scenarios of failure with the presence of imperfect channels, falls of participants, violation of synchronizations or even when some of them can conspire so that consensus does not occur (behavior malicious).
