Western Governors University (WGU) ITEC2112 D315 Network and Security - Foundations Pre-assessment Practice Exam

The correct response is indeed C, as IP addressing operates at Layer 3 of the OSI model, which is the Network layer. This layer is primarily responsible for routing packets of data from the source to the destination across different networks. It accomplishes this through the use of logical addressing, specifically IP addresses.

At Layer 3, routers utilize IP addresses to determine the optimal path for data packets as they traverse different segments of a network or even different networks. This addressing method allows devices to communicate with each other regardless of their physical or geographical locations, making it essential for the functionality of the internet and various local networks.

Moreover, options related to Layers 4, 5, and 2 involve different protocols and responsibilities. Layer 4, known as the Transport layer, manages end-to-end communication and error recovery but does not perform routing through IP addresses. Layer 5, the Session layer, is focused on managing sessions and does not involve itself in addressing or routing. Layer 2, the Data Link layer, is responsible for physical addressing and frame delivery within local network segments but does not handle the routing of data across multiple networks, which is the primary function of Layer 3.