Q: Which layer abstracts away the need for any other layers to care about what hardware is in use?
or
Q: Which layer makes it unnecessary for any other layer to be concerned about the hardware that is being used?
- Transport
- Data Link
- Physical
- Network
Explanation: The “Network layer” (Layer 3) is the layer that removes the need for any of the other levels to be concerned with the specific hardware that is being used. In networking protocols, such as the OSI model or the TCP/IP model, the Network layer is responsible for logical addressing, routing, and the forwarding of data packets across various networks. Similarly, the Transport layer is responsible for the transport of data packets. It does this by hiding the specifics of the underlying hardware to make it possible for various devices and networks to connect, independent of the particular hardware technologies that are being used. One example of a protocol that operates at the Network layer and makes this abstraction easier to achieve is known as the Internet Protocol (IP).
