Final answer:
The correct answer is A. Data Link and Physical layers. WAN (Wide Area Network) technologies are implemented at the Data Link and Physical layers of the OSI model.
Step-by-step explanation:
The correct answer is A. Data Link and Physical layers. WAN (Wide Area Network) technologies are implemented at the Data Link and Physical layers of the OSI model.
The Data Link layer is responsible for the reliable transmission of data between two adjacent network devices. It ensures error-free transmission over the physical medium and handles framing, error detection, and flow control.
The Physical layer is responsible for the actual transmission of bits over the physical medium, such as copper wires or fiber optic cables. It defines the electrical, mechanical, and functional specifications of the physical medium.