The open systems interconnection (OSI) model is a conceptual model created by the International Organization for Standardization which enables diverse communication systems to communicate using standard protocols.

What Open Systems Interconnection layer does IP belong to?

A router is a hardware routing device. A router works at layer 3 of the OSI model—the Network layer—and so can communicate between various networks. Layer 3 is where the IP protocol examines the source and destination of packets between IP addresses.

Why OSI is called open system interconnection?

This model is called the ISO OSI reference model because it deals with systems that open for communication to the other system. So, An OSI (open system interconnection )reference model is a set of protocols that allows any two different systems to communicate regardless of their underline architecture over the network.