Which of the following is not a function of Layer 2 in the OSI model?

Layer 2 of the OSI model, also known as the Data Link Layer, is responsible for functions that relate to the direct node-to-node transfer of data. One of its primary responsibilities is linking network nodes, meaning it facilitates communication between devices on the same local network. Data framing is another critical function, where it organizes bits into frames that can be sent over the physical medium. Additionally, error detection and handling ensures that any discrepancies or errors in the transmitted frames are identified and addressed.

Routing data packets, however, is not a function of the Data Link Layer. This responsibility falls under Layer 3, the Network Layer, which deals with packet forwarding, including routing through different nodes across networks. Layer 3 manages paths through the network and makes decisions based on IP addresses, whereas Layer 2 focuses on the local link between devices and does not involve moving packets from one network to another. Therefore, routing data packets is outside the scope of Layer 2 functions.