Yes, fiber internet can be shared under some circumstances, so let us explore this in further detail. Cable companies, for example, can lay a single fiber link. A fiber-optic connection offers the fastest internet around, with upload speeds as fast as download. So residential. Shared fiber, technically delivered via GPON (Gigabit Passive Optical Network) or its successor XGS-PON, is the most common way residential and small business fiber-to-the-home services are deployed. Those differences can make or break a business fiber network. Although bandwidth is commonly confused with internet speed, bandwidth is solely the volume of data transmitted over an internet connection in a given amount of time.