What function does a backbone cable perform in a network?

The backbone cable is integral to a network as it forms the main trunk of the network infrastructure. Its primary role is to interconnect various segments of a local area network (LAN) or connect different LANs to ensure efficient data flow across the entire network. By serving as the major conduit through which data passes, the backbone cable facilitates communication between different network devices, such as switches, routers, and servers. This is crucial for maintaining the network's overall architecture and performance.

While options such as providing internet access or serving as a backup connection might touch on related concepts, they do not accurately capture the specific function of a backbone cable. A backbone cable can be used to connect devices, but it is not limited to peripheral devices; rather, it connects various elements of the entire network. The definition of its function is thus best reflected in its role as the primary structural pathway for network communication.