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## STP Puzzle 3

Who will be elected root in this latest #CCNA STP Puzzle? I just voted, so it made me think about doing another STP puzzle series. The first step: which switch becomes root? Big picture: Today’s post gives you part

## STP Puzzle #2 – Answer

If you didn’t see the puzzle problem statement, then the answers won’t make as much sense. Especially for this one, the new post this week that gives some suggestions on how to attack these STP puzzles can help. The realization

## STP Puzzle Overview

I’ve named a new type of blog post: an STP Puzzle. The big idea is pretty simple. The problem tells you some (but not all) facts about Spanning Tree Protocol (STP) in a small switched network. Your job: determine as

## STP Puzzle #2

Here’s the 2nd STP Puzzle. As with most of these drill-style practice problems, take a look at the problem statement, and work it out. No need to rush on this one – just get it right. These STP puzzles give

## STP Puzzle #1, Answer Part 3

This post wraps up the discussion of STP Puzzle #1 with a brief look at finding the designated ports (DPs) on each link between switches. As usual, check out the original post to make sense of this one. Note that

## STP Puzzle #1, Answer Part 2

This post looks again at STP Puzzle #1. As usual, check out the original post to make sense of this one. Part 1 of the answer determined that switch S4 is the root in this puzzle. This post walks through

## STP Puzzle #1, Answer Part 1

This post starts to answer STP Puzzle #1. As usual, check out the original post to make sense of this one. These puzzles give you some info about Spanning Tree Protocol (STP) in a particular network. Your job: figure out

## STP Puzzle #1

This blog post is the first of what may be a whole new type. You can read all day about Spanning Tree Protocol (STP), and learn the theory, but that’s not enough. When you later try to apply STP concepts

## STP – do we really need a Listening state?

Long story, but I had a reason today to try and think of a case in which a temporary loop might occur for which the listening state in STP was really necessary. The short answer? I couldn’t come up with

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