Consensus is one of the most important and fundamental problems in distributed computing. On the surface, it seems simple: informally, the goal is simply to get several nodes to agree on something.
Concensus tries o get a group of nodes connected y an unreliable network to agree on something. It is a hard problem to solve because each node is isolated from he rest and cant even trust that ts clock is in sync with the others. It has n way of knowing if itis alone olr if it can connect to other nodez. And this happens for every message it ries to send.
