physical & data link layers
Transport layer and Network layer.
Physical Data Link
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.
Physical, Data link and Network layers make the Network Support layers.
Network Layer
identifies the network layer protocol makes the connection with the upper layers insulates network layer protocols from changes in physical equipment
insulates network layer protocols from changes in physical equipment makes the connection with the upper layers identifies the source and destination identifies the network layer protocol
Network layer
Router works in Network Layer of OSI model
The Network Interface layer
seven
The INTERNET LAYER of OSI model exists for "routing" and providing a single network interface to the upper layers.