Final answer:
The network core is defined by interconnected routers that direct traffic across the network. While computers, switches, and hubs are network components, they do not form the core.
Step-by-step explanation:
The term network core typically refers to the central part of a network, where high-speed, high-capacity devices are interconnected to route data efficiently across the network. The appropriate definition for network core would be B. Interconnected routers, as routers are the devices that perform the traffic directing functions of the Internet and are essential in connecting different subnetworks to ensure data packets are sent from their source to their destination via the most optimal path.
Interconnected computers, switches, and hubs can be components of a network, but they do not constitute the core. Computers are endpoints, and while switches and hubs are used to connect devices within a network segment, routers are used to interconnect these segments at a higher level, making them central to the network infrastructure.