Consider the bandwidth limitations of your Internet service. Chances are you will never exceed 1Gb/s. Cat 5 will easily accommodate your needs, but cat 5e is the minimum you can commercially obtain these days. Cat 6 or higher is just a waste of money. Think of it this way: if you are driving your family of 4 around, why would you buy a greyhound bus? I would caution you to avoid the temptation to make your own cables. Just buy factory made cables from Leviton or Hubbel.
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