Final answer:
The command to map a network drive is NET USE, which assigns a drive letter to a shared network resource, allowing for easier access on a local computer.
Step-by-step explanation:
The command used to map a network drive is B. NET USE. This command allows a user to connect to a shared resource on a network and assign it a drive letter on their local computer. For example, using the command NET USE Z: \\Server\SharedFolder will map the network share located at \\Server\SharedFolder to the drive letter Z. It's a useful command for creating a persistent or temporary connection to a network resource.