What type of network utilizes radio, light, or other means for physical layer interconnections without being confined to wires or cables?

The description provided in the question pertains to a network type that uses various physical signals like radio waves or light to establish connections, unconfined by traditional wiring. An unbound (wireless) network fits this definition perfectly, as it employs wireless communication methods such as Wi-Fi, Bluetooth, or cellular technologies, allowing devices to connect over a physical distance without the need for cables.

This flexibility is a key characteristic of wireless networks, enabling connectivity in environments where wiring might be impractical or impossible. For instance, in urban areas or expansive spaces like parks, the use of wireless technology facilitates communication between devices without the limitations and logistical challenges of physical cabling.

In contrast, other options involve different characteristics. A bound network would typically refer to those that rely on physical connections like cables, while a wired network specifically signifies a setup that employs cables for communication. A mobile network generally involves wireless technology but is more focused on mobility and cellular communication rather than the broader concept of wireless interconnectivity. Thus, the unbound (wireless) network is the most accurate choice given the context of physical interconnections without cables.