application layer
application layer
The Seven layers of the OSI model are: Application Presentation Session Transport Network Data-Link Physical I think the answer to your question is the Application layer.
Network interface
Network Interface Layer
The Application Layer is responsible for interfacing a user network request from an application via an API (application Program Interface) with the network stack. This allows an application to not have to know anything about how to do network functionality; it can merely request the network software to do something without worrying about the details.
Router is a Layer 3 (Network Layer)device that checks packet's IP Address at input interface & routes them to interface connected to destination network if available.
signaling
The data-link layer The physical layer
The interface between the physical layer and the network link layer.
The Network Interface cards
Data Link
The Network Interface layer