Devices on a network are identified by which of the following?

Devices on a network are identified primarily by their MAC address and IP address. The MAC address, or Media Access Control address, is a unique identifier assigned to a network interface controller (NIC) for communications on the physical network segment. It operates at the data link layer and is used for local network identification.

On the other hand, the IP address, or Internet Protocol address, serves as a unique identifier for a device within a networked environment, particularly for routing data across different networks. It operates at the network layer and is crucial for internet-based communications.

Together, the MAC address and the IP address enable devices to communicate effectively within a local network as well as over the internet. This dual-identification mechanism ensures that data packets reach their intended destinations correctly and efficiently by allowing for both local and broader network interactions.