How many layers are there in the OSI model?

Which OSI layer is responsible for routing data packets?

The TCP protocol operates at which layer of the OSI model?

Which layer of the OSI model is closest to the end user?

What is the main function of the Physical layer in the OSI model?

Which layer is responsible for ensuring reliable data transfer between two devices?

Which layer manages dialogues between applications?

What is the role of the Presentation layer?

Which layer is responsible for framing?

What data unit is used at the network layer?