Final Answer:
The designation of a Layer 2 PDU as a "Frame" is grounded in the OSI (Open Systems Interconnection) model, which conceptualizes network communication into seven layers. Therefore, the correct answer is option b) Frame.
Step-by-step explanation:
In networking, data is organized into different layers for efficient transmission. Layer 2, also known as the Data Link Layer, is responsible for the reliable transmission of frames between devices on the same network. A **frame** is a Layer 2 Protocol Data Unit (PDU) that encapsulates the data for delivery. Unlike a packet (option a), which is associated with Layer 3 (Network Layer), a frame operates at the Link Layer and contains the necessary information for local network communication.
The Data Link Layer encapsulates the packet received from the Network Layer into a frame. This encapsulation involves adding header and trailer information to the packet. The frame includes source and destination MAC addresses in the header, ensuring that data is correctly delivered within the local network. Frames play a crucial role in the Ethernet protocol, which is widely used for communication in LANs. Understanding the distinction between packets and frames is essential for designing and troubleshooting network architectures, as it ensures data is appropriately formatted for transmission within the local network segment.
In summary, the correct term for a Layer 2 PDU is a **frame** (option b), emphasizing the role of the Data Link Layer in managing local data transmission.