When John sends data to Smith, which layer of OSI model delivers the data to Smith's desktop?Data link LayerTransport LayerNetwork LayerSession Layer

To determine which layer of the OSI model delivers data specifically to Smith's desktop when John sends it, we need to analyze the roles of the OSI layers in the data transmission process.

1. Transport Layer: This layer ensures that data is transferred reliably between hosts. It is responsible for managing end-to-end communication and error correction, but it does not directly interact with the physical network to deliver data to specific devices.

2. Network Layer: The network layer is responsible for routing data from the source to the destination across multiple networks. It handles logical addressing and can span multiple physical networks, but again, it does not deliver data directly to a device.

3. Data Link Layer: This layer is responsible for node-to-node data transfer and provides the means for the exchange of data between devices on the same local area network (LAN). It ensures that data frames are properly addressed to reach the intended local device.

4. Session Layer: The session layer manages sessions between applications. It establishes, maintains, and ends connections, but it does not deal with the physical transfer of data to the desktop.

Given these roles, the data is delivered to Smith's desktop by the Data Link Layer since it handles the delivery of frames to devices on the local network, which includes the desktop.

Final Answer

Data Link Layer is the layer of the OSI model that delivers the data to Smith's desktop.