Optimum delivers internet and TV through their coaxial cable network.
Cable networks offer internet by broadcasting data over a fiber line to a node in your neighborhood and then covering the last part of the connection using coaxial.
This infrastructure is normal among providers that historically specialized in TV, since they already installed coaxial lines to customer houses.
The provider has been rolling out DOCSIS 3.1, which allows the company to provide gigabit broadband
options depending on the local infrastructure.
DOCSIS is the protocol used to transmit information over coaxial cables. DOCSIS 3.1 allows multiple-gigabit speeds, competing with fiber providers.