Which tool would you use to learn the media access control (MAC) address of a computer on the local network, knowing its logical address?

The most appropriate tool to learn the media access control (MAC) address of a computer on the local network when you know its logical address (IP address) is the Address Resolution Protocol (ARP). ARP operates within a local area network (LAN) to map IP addresses to MAC addresses.

When a device wants to communicate with another device on the same network, it must know the MAC address corresponding to the IP address it wishes to communicate with. ARP broadcasts a request packet on the network that asks, "Who has this IP address? Please send me your MAC address." The device that owns the specified IP address responds with its MAC address. This process allows the original device to obtain the necessary MAC address and establish data communication effectively.

The other tools listed do not serve the same function. A Network Utility provides various networking tools, but it may not directly resolve MAC addresses from IP addresses like ARP does. An IP Lookup Tool typically provides information based on the IP address such as geographical location or domain name, rather than resolving to a MAC address. The Ping Command is used to test connectivity to a host using its IP address but does not provide MAC address resolution. Thus, ARP is the correct and most appropriate choice for this task.