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One of the biggest challenges for CCNA students (not to mention other Certification levels) is mastering Spanning Tree Protocol (STP). And the bad news for students is the fact that you no longer must master one version, but three versions of this critical protocol. Here is a quick review of the Spanning Tree Versions you want to be well-versed in for the CCNA, and beyond.


Classic Spanning Tree Protocol possesses a standard designation of 802.1D. You need to memorize these standard identifiers. For classic STP, just think Dog-gone Slow. The convergence delays the classic version can present are unacceptable for modern LAN uses of today, like the transmission of Voice and Video traffic. There is plenty of excellent documentation about Classic Spanning Tree Protocol out there, and that is really beneficial since most environments are still using this approach (as of the time of this writing of course). We need to study 802.1D very carefully and with intensity. This protocol prevents Layer 2 loops, and its operation is still at the heart of the enhanced versions.

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I would like to thank all of our blog readers that are constantly asking me for more Top Ten lists. I hope you enjoy the latest installment and have a safe, happy, and prosperous 2009.

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