Physical, Data link and Network layers make the Network Support layers.
IP is a layer 3 (network layer) protocol used for routing
The network layer is the layer that is responsible for routing packets on the network. This is the layer in which Internet protocol operates. In the seven layer OSI model, the network layer is the third layer from the bottom.
The "Internet" layer in the TCP/IP model more or less corresponds to the "Network" layer (layer 3) of the OSI model. Both have the task of connecting different networks, independently on the type of layer-2 network; and of providing addresses to every machine on the Internet.
Network layer
The Internet model consists of 4 layers: Application layer, Transport layer, Network layer, and Link layer. Each layer is responsible for specific functions in the process of sending data over the Internet.
Transport layer and Network layer.
The network layer (Internet Layer in TCP/IP model) is the second layer of the TCP/IP model. IP (Internet Protocol), ARP (Address Resolution Protocol), RARP (Reverse Address Resolution Protocol), ICMP (Internet Control Message Protocol) and IGMP (Internet Group Management Protocol) are the protocols at this layer. http://www.omnisecu.com/tcpip/internet-layer.htm
The INTERNET LAYER of OSI model exists for "routing" and providing a single network interface to the upper layers.
Networking layer of the OSI model
In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).In the OSI reference model, that would be layer 3 (network).
transport layer processes occur between the applicaitoin layer and internet layer of the TCP/IP and between the session layer and network layer of the OSI model.
Router works in Network Layer of OSI model