Solution

The correct answer is Option 2) B and C Only.

Key Points

• An ATM (Asynchronous Transfer Mode) network typically has the following types of interfaces:
• User-to-Network Interface (UNI): This interface connects end users to the ATM network. It is essential for the user to access the network services.
• Network-to-Network Interface (NNI): This interface connects different ATM switches within the network. It is used for interconnecting different parts of the network to ensure smooth data transfer.

Additional Information

• Option A: User-to-User - This is not a standard interface type in ATM networks. Communication between users generally goes through the network.
• Option D: Host-to-Network - While similar to user-to-network, this term is not typically used in the context of ATM networks.
• Option E: User-to-Host - This is not a specific interface type in ATM networks. It may refer to user communication with a host, but not a standard ATM interface.