Leader/Follower relationship with Primary/Replicas

In most of distributed datastore systems, there are a lot of techical terms to describe the behavior of the system. While these terms, like, &ldquo;Leader&rdquo;, &ldquo;Follower&rdquo;, &ldquo;Replication&rdquo;, &ldquo;Consistency&rdquo;, etc., are widely used and helpful, what I feel missing are the details about internal relationship between these terms. Analogically, while the map of the…