What type of addressing allows devices on a network to uniquely identify each other at layer 2?

The correct answer is MAC Addressing because it operates at Layer 2 of the OSI model, which is responsible for the data link layer. MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications on the physical network segment. Each device on a local area network (LAN) is assigned a unique MAC address, which is essential for the process of switching and ensuring that data packets are sent to the correct device.

In contrast, IP Addressing functions at Layer 3 of the OSI model and is used for routing data across networks rather than uniquely identifying devices within a local network segment. Network Addressing is a broader term that might encompass both IP and MAC addressing but does not specifically refer to the method utilized at Layer 2. Dynamic Addressing refers to the assignment of IP addresses dynamically (often through DHCP) but does not relate to the unique identification of devices at Layer 2. Therefore, MAC Addressing is the definitive method that allows devices to be uniquely identified at Layer 2, enabling effective communication over the network.