You've probably noticed those strange cylinders at the end of your puter cables.
It looks a bit like the cable was a bit overzealous at dinnertime and swallowed something a bit too large...
As it happens, those strange meals are actually ferrite cores.
Ferrite is a totally magical material!
While there are many different types of ferrite used for things such as transformers, inductors, magnets in motors, and all kinds of other stuff, one of the most common uses is for ferrite chokes.
A choke is basically a filter - in this case a low-pass filter - that prevents high-frequency noise from passing along your data cable (or its shielding).
So there you have it!
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