RG-6 Cable is the most common cable used for TV signal distribution to or in the home.
The RG-6 cable is available with different shielding (protection from interference) percentages. The most common is 60% and Quadshield. When the cable distance is long (>300 feet) RG-11 cable is normally used since it has less signal loss than RG-6. However, RG-6 is less expensive, smaller and easier to handle, which is why it is used most often.