Network Layer

Moving up to the next layer in the stack we come to the network layer. This layer actually routes packets of data, finding a path (both physical and logical) to the receiving or destination computer.

It provides a unique address for each node through address resolution. One of the most common protocols for routing information at this layer is the Internet Protocol (IP). An example of hardware that can operate at this layer is a router. Although routers are often used to allow a LAN to access a WAN, layer 3 switches can also provide routing capabilities, but often at full wire-speed.