Answers:
The use a hybrid fiber coax system. They run fiber optic cable from the headend to respectively node. Each node serves 500 to 2000 homes. At the node, it is converted from bedside light to RF (radio frequency) and go from fiber optic cable to coaxial cable. This is matching design of cable that you hold coming into your home, of late a much larger diameter. So the large coaxial cable pass by respectively home. A thump is installed in the larger coax cable where on earth the small adjectives coax cable attaches and go into your home.
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The trunk lines are adjectives fiber optic, which is much faster than any 100base5 or 1000base6 cable can ever be.