How Cable Internet Works: A Plain-Language Guide
Cable internet is one of the most common ways homes connect to the internet. Here's a general walkthrough of the concepts behind it.
Shares infrastructure with cable TV
Cable internet generally travels over the same coaxial cable lines historically used for cable television, using a technology standard commonly referred to as DOCSIS.
Hybrid fiber-coaxial networks
Most modern cable networks use fiber-optic cable for the bulk of the distance, switching to coaxial cable only for the final stretch into individual homes — a setup often called hybrid fiber-coaxial (HFC).
Shared neighborhood bandwidth
Cable internet capacity in a given area is sometimes shared among nearby households, which is one reason speeds can occasionally vary during peak usage times in a neighborhood.
How this differs from full fiber
"Full fiber" or "fiber-to-the-home" internet runs fiber-optic cable all the way to the home rather than switching to coaxial cable, which can generally offer more symmetrical upload and download speeds where available.
This is general educational information about how the category of service tends to work, not specific to any one provider's current network architecture in a particular area.