What type of network configuration allows for devices to communicate over multiple networks?

The option that represents a network configuration allowing devices to communicate over multiple networks is routing. Routing processes involve determining the best paths for data packets to travel across interconnected networks. It enables different network segments, possibly with different addressing schemes, to communicate with one another. Routers make decisions based on routing tables and protocols, directing packets to their destination across varying network infrastructures.

Subnetting, VLANs, and switching serve different purposes within network design. Subnetting is primarily concerned with dividing a larger network into smaller, manageable segments, but it does not inherently facilitate communication between distinct networks. VLANs create logical separation within the same physical network, allowing devices to communicate as if they are on their own network, yet communication across different VLANs still necessitates routing. Switching, on the other hand, operates at layer 2 of the OSI model and allows devices to communicate within the same network segment but does not facilitate communication across different networks without the involvement of a router.