Which of the following would be good reasons to run NAT?1. You need to connect to the Internet and your hosts don't have globally unique IP addresses.2. You change to a new ISP that requires you to renumber your network.3. You don't want any hosts connecting to the Internet.4. You require two intranets with duplicate addresses to merge.

• A. All of these
• B. 3 only
• C. 2 and 4
• D. 1, 2 and 4

Answer: (D)