Network Layer. In the seven-layer OSI model of computer networking, the network layer is layer 3.
The network layer is responsible for packet forwarding including routing through intermediate routers, whereas the data link layer is responsible for media access control, flow control and error checking. Functions[edit] The network layer provides the functional and procedural means of transferring variable-length data sequences from a source to a destination host via one or more networks, while maintaining the quality of service functions.
Functions of the network layer include: Wireshark ? Go deep. Nmap - Free Security Scanner For Network Exploration & Security Audits. BackTrack Linux ? Penetration Testing Distribution. Default Passwords. The Freenet Project - /index.