Final answer:
A T3 connection, typically used by businesses for WAN services, is a type of leased line, which offers dedicated bandwidth and service levels.
Step-by-step explanation:
A T3 connection is an example of a leased line.
Leased lines are a type of telecommunications connection that offer dedicated, symmetrical data and voice channels and are typically used by businesses to connect geographically distant offices. Unlike DSL, cable, or fiber optics where infrastructure might be shared among users, a leased line is exclusively reserved for the use of the connecting organization, providing a fixed amount of bandwidth with a guaranteed level of service.
While fiber optics offer several advantages over copper systems—such as low loss, high bandwidth, and reduced crosstalk for optical communications—T3 lines traditionally use copper coaxial or fiber optic cables to provide a reliable and high-capacity connection for WAN services.