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Digital communication cables can be used to connect indoor electronic equipment such as computers and TVs to prevent the interference of strong electromagnetic signals from the outside world and avoid the distortion of effective signals.

CAT7 Cable, more commonly known as a Cat7 or Cat-7 cable, is a type of high-end data transfer patch cable used in delivering the core infrastructure of wired Gigabit Ethernet setups.

CAT6 Cable  is a standardized twisted pair cable for Ethernet and other network physical layers that is backward compatible with the Category 5/5e and Category 3 cable standards.

CAT6A Cable is made and terminated to tighter tolerances than Cat6. This means the copper conductors are twisted tighter. This requires higher specification patch panels, wall jacks, and RJ45 connectors.

One of the interesting things about CAT5 Cable and CAT5E Cable is that they are virtually identical in their physical appearance. You cannot tell them apart based on thickness, color, or the material used. The only way to identify them is to look at the text that is printed on the cable and see for yourself. With that being said, some manufacturers have gone out of their way to improve the durability of the PVC protective jacket on the Cat5e cables. This makes them better suited for frequent use over a period of several years, if not decades. An alternative and unneeded way to tell the two apart would be to cut open the cables and inspect the wiring inside. In general, the wires in Cat5e cables are twisted far more tightly than those in the Cat5 cable. This is what allows Cat5e cables to be more resistant to crosstalk.

A Hybrid cable may contain a combination of optical fibers, twisted pair/quad, coaxial and current-carrying electrical conductor elements as required, under a common outer sheath. A Telco Hybrid cable can contain more than one fiber type in the same cable as well as copper elements (typically twisted pairs).