Final answer:
The Protocol Data Unit (PDU) for the Data Link layer is called a frame; it is used for node-to-node transfer and error handling on the network.
Step-by-step explanation:
The Protocol Data Unit (PDU) for the Data Link layer in the OSI model is known as a frame. Each layer of the OSI model has a PDU specific to it; for instance, the Network layer uses packets and the Physical layer uses bits. The purpose of a frame at the Data Link layer is for node-to-node data transfer and for handling errors that might occur during the physical transmission of packets on the network.
The name for the Protocol Data Unit (PDU) of the Data Link layer is frame. A frame is a unit of data transmission in a computer network that contains control information, as well as the actual data being transmitted. It includes the source and destination MAC addresses to ensure proper delivery. Frames are used in protocols like Ethernet and Wi-Fi to transfer data between devices.