Which layer corresponds to 'network' in the described layer scheme?

• A. 6 - Presentation
• B. 3 - Network
• C. 8 - User
• D. 4 - Transport

Answer: (B)

The layer being tested is the one that handles routing and forwarding packets between different networks. That means it provides logical addressing and path determination to move data from a source to a destination across multiple networks. In the described scheme, this is the layer that corresponds to the network function, so it’s the correct match for determining how inter-network delivery is managed.

Data representation and formatting, encryption, and compression live in the presentation layer, not in the network layer. The transport layer focuses on end-to-end delivery between hosts, including reliability and flow control, which is different from routing across networks. The topmost or user-related layer handles user-facing interactions, not the mechanics of moving packets through networks.