I’m not a cable expert by any means and can’t answer all the questions, but I can tell you that the protocol used by cable is called DOSCIS. So it might guide you into some of those answers.

And the coax cable itself doesn’t go very far now because it’s connected to a fiber network somewhere in your neighbourhood.

A few years ago I had a depression and two dreams were coming back repeatedly.

My apartment was a floating in the middle of the ocean and I had to defend it against “invaders”, like my landlords, my parents, some of my “friends”. They were all trying to “attack” me and invade my now lonely isolated floating apartment.

The other one is my fit coworker hunting and running after me to capture me and bring me back forcefully to my parents, from which I was running away, in my mid thirties.