Final answer:
The MAC address is located in the header of a network frame, corresponding to the data-link layer of the OSI model.
Step-by-step explanation:
The MAC address of a network interface card is found in the header of a network frame. Network frames exhibit a structured layering, comprising a header, payload, and trailer. Within the frame header, both source and destination MAC addresses are specified, ensuring precise delivery to the intended device within a local network segment. The payload encapsulates the substantive data undergoing transmission, while the trailer commonly accommodates error-checking information. This layered framework, specifically at the data-link layer, exemplifies the organized architecture facilitating effective communication within computer networks.
In the OSI model, this corresponds to the data-link layer. Network frames have a layered structure, which typically includes a header, payload, and trailer. The header of the frame includes source and destination MAC addresses, ensuring that the frame reaches the correct device on a local network segment. The payload contains the actual data being transmitted, and the trailer often contains error checking information.