TCP/IP because the osi model has seven layer but in tcp/ip only four layers and most important is that the tcp/ip model is reduce the function of osi model.
From lowest to highest physical, data, transport, sessions, presentation, application.
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.
Application gateway/proxy
layer 4 - transport layer
NIC's can perform in the Data Link Layer of the OSI model. However, they can also perform services in the Physical Layer.(Network+ Guide to Networking Answer)Physical and Data Link layers
All layers.
A NIC operates at those two layers.
OSI
Answer: Data Link
Yes, they are devices that operate at different layers of the OSI model for networking.
Application Presentation Session
The OSI Model stands for Open Systems Interconnection. The answer to the question which layer of the OSI model are layers capable of functioning is at all layers.
application -top of osi model physical- bottom of osi model
Router works in Network Layer of OSI model
The Physical Layer of the OSI model.
The OSI Model has 7 layers. Application Presentation Session Transport Network Data Link Physical