Which OSI layer is associated with devices such as NICs and wireless network adapters for frame delivery?

Which OSI layer is associated with devices such as NICs and wireless network adapters for frame delivery?

• A. Data Link Layer
• B. Physical Layer
• C. Network Layer
• D. Transport Layer

Answer: (A)

Frame delivery on a local network is handled by the Data Link Layer. This layer wraps data into frames, uses MAC addresses to identify devices on the same network, and adds error detection to verify frames after transmission. Wireless and wired NICs implement this layer by taking frames from the Data Link Layer, placing them on the physical medium, and delivering incoming frames to the correct device on the local network. The Physical Layer is about the actual signaling on the medium, the Network Layer handles routing across networks, and the Transport Layer deals with end-to-end communication. So, framing, addressing, and local delivery to NICs and wireless adapters belong to the Data Link Layer.

Frame delivery on a local network is handled by the Data Link Layer. This layer wraps data into frames, uses MAC addresses to identify devices on the same network, and adds error detection to verify frames after transmission. Wireless and wired NICs implement this layer by taking frames from the Data Link Layer, placing them on the physical medium, and delivering incoming frames to the correct device on the local network. The Physical Layer is about the actual signaling on the medium, the Network Layer handles routing across networks, and the Transport Layer deals with end-to-end communication. So, framing, addressing, and local delivery to NICs and wireless adapters belong to the Data Link Layer.