The frame header contains the source and destination addresses that indicate which device originated the frame and which device is expected to receive and process it. In contrast to the hierarchical and routable addresses of the network layer, layer 2 addresses are flat, meaning that no part of the address can be used to identify the logical or physical group to which the address belongs.
The frame header contains the source and destination addresses that indicate which device originated the frame and which device is expected to receive and process it In contrast to the hierarchical and routable addresses of the network layer layer 2 addresses are flat, meaning that no part of the address can be used to identify the logical or physical group to which the address belongs