Which of the following is a unicast address that is assigned to two or more devices on the same network?

The correct answer is anycast address. An anycast address is a network addressing and routing methodology in which a single address can be assigned to multiple devices (often referred to as hosts) on the same network. When data is sent to an anycast address, it is delivered to the nearest device (in terms of routing distance) that is configured to respond to that address. This allows for more efficient routing and resource usage since it can direct queries to the closest server, enhancing performance and reducing latency.

In contrast, a network address typically refers to a specific identifier for a network segment rather than individual devices, and is not shared among multiple devices. A broadcast address is meant for communication to all devices on a network, while a multicast address targets a specific group of devices without the intent to address them individually or universally. This differentiation helps to clarify why anycast is uniquely suitable for the situation described, emphasizing its shared nature among multiple devices while still maintaining unicast communication to the nearest one.