How many subnets are required to support the network shown?

To determine the number of subnets required, you need to know the number of distinct network segments or groups of devices that require separate IP address ranges. Each subnet typically supports a specific number of hosts, and the total demand for hosts across all segments will dictate how many subnets are necessary. If you provide more specific details about the network layout or the number of devices, I could give a more precise answer.