A few months ago, before I started working for the company I now work for, one of the store outlets of the company had a big networking issues.
They figured out that the source of the problem was a local employee of the store who had connected a small US Robotics switch to the outlet, to provide for more UTP connections.
Recently, I had to logon to that switch and noticed that Spanning Tree had been enabled, and because I was told that the switch configuration had never been changed since the issue, I thought this was strange. Spanning Tree should have seen the loop, and prevented it by just disabling the port with the switch on it.
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