Question: Who provides the provision of Domain Name services in the non-transparent case?
Option 1: PLMN operators
Option 2: Internet Service Provider (ISP)
Option 3: Packet Data Network (PDN) operator
Option 4: User Equipment (UE)
Explanation: In a non-transparent case, the provision of Domain Name services is provided by the Internet Service Provider (ISP). This is because in a non-transparent scenario, the ISP has more control over the network and can provide DNS services to its subscribers.