Final answer:
Internet Protocol (IP) functions at the Network layer of the OSI model, where it is responsible for routing packets, including logical addressing, to ensure they reach the correct destination.
Step-by-step explanation:
The Internet Protocol (IP) operates at the Network layer of the Open Systems Interconnection (OSI) model. The OSI model is a conceptual framework used to understand and standardize the functions of a telecommunication or computing system without regard to its underlying internal structure and technology. The Network layer is responsible for packet forwarding including routing through intermediate routers. IP is one of the primary protocols in this layer, and it is tasked with delivering packets from the source host to the destination host based on the IP addresses in the packet headers. IP provides logical addressing which is necessary for a packet to traverse across networks and reach the correct destination.