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Electricity
u\ftp This type of cable has no overall shielding but the individual twisted pairs are wrapped in a foil screen, offering some protection from EMI and crosstalk from adjacent pairs and other cables.
se/utp This cable has both an overall braid shield and foil shield with unshielded twisted pairs. This cable offers effective protection from EMI both from the cable and into the cable as well as much better grounding due to the additional braid.
Often referred to as FTP, this type of cable features an overall foil shield wrapped around unshielded twisted pairs and a drain wire. When the drain wire is correctly connected, unwanted noise is redirected to ground, offering extra protection against EMI/RFI.
U/UTP
U/UTP, sometimes also called UTP, stands for unshielded twisted pair. Inside the CAT6A UTP cable, each pair of cables is twisted and separated by a cross divider. This is the cheapest and most common type of cable implemented.
S/FTP
S/FTP stands for shielded foiled twisted pair.
Inside the CAT6A S/FTP cable, each pair of cables is twisted and wrapped with metal foil. All cables are then collectively wrapped by a strong, yet flexible braid screen.