Which of the following terms refers to the unique address assigned to each device on a network?

The term that refers to the unique address assigned to each device on a network is the IP Address. An IP Address (Internet Protocol Address) serves as an identifier for a device on a network, enabling it to communicate with other devices and participate in network activities. Each device must have a distinct IP Address to ensure data is routed correctly to the appropriate destination.

In the context of networking, each IP Address consists of a numerical label, typically formatted as four sets of numbers separated by periods in IPv4 (for example, 192.168.1.1) or as eight groups of hexadecimal numbers in IPv6 (for example, 2001:0db8:85a3:0000:0000:8a2e:0370:7334). This unique addressing is essential for the functioning of the internet and local networks, allowing devices to send and receive information efficiently.

The other terms describe important networking concepts but do not represent a unique address. For example, a Subnet Mask is used to determine the network portion of an IP Address, a Router ID is an identifier for a router within a protocol, and a Network Identifier is a broader concept that may refer to various addresses or identifiers related to a network as a whole