STP
Lots of things in networking are based on trees, branches, and leaves. STP is no exception. My intent is not to give you a book or chapter that tells you everything you need to know about STP, but rather to review the critical components and analyze it from the practical perspective.
You, like many other network engineers, might consider STP to be one of those theory things that you never have to worry with in the practical world. However, the truth is STP accounts for more than half of the issues with configuring, maintaining, and supporting campus networks.
STP is so critical because it is a dynamic loop prevention protocol for Layer 2. Time to live (TTL) does not exist at Layer 2; STP is what prevents frames from looping endlessly around ...
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