Final answer:
The OSI network layer, also known as Layer 3, is responsible for routing and forwarding data packets between different networks.
Step-by-step explanation:
The OSI network layer, also known as Layer 3, refers to the third layer in the Open Systems Interconnection (OSI) model. This layer is responsible for routing and forwarding data packets between different networks. It provides network addressing, encapsulation, and packet routing functionality. An example of a Layer 3 protocol is the Internet Protocol (IP) which is used for sending and receiving data over the Internet.