Here’s the honest truth. Today, the people responsible for a stable, performing network are pushed to their limit. They have few resources and ever increasing responsibilities—which leaves them with very little time to research the causes of transient slowdowns or problems. And when they do have time, the problem has gone away (the very nature of a “transient” condition).
The most common approach when faced with a “gremlin” is to wait until the problem occurs again. But this certainly won’t gain you any points with your customers—in fact, every time you do this you tarnish IT’s reputation.
