Are all channels play at once through a cable TV line and how does the internet travel both ways on the same line?

Question

Bonus Question: How do networks know what’s being views the most?

In: 1

Answer 1

The cable TV is split into different frequencies on the cable. Your TV or cable box tunes into those frequencies and decodes them. Same for the internet, the cable modem modulates and demodulates the internet signal on the cable wire.