Which tool includes a script that can enumerate open ports?

Which tool includes a script that can enumerate open ports?

• A. DNS zone transfer
• B. dig command
• C. NSLookup
• D. RPCScan

Answer: (D)

Port enumeration is about identifying which network ports are open on a target and what services are listening on those ports. RPCScan is built to probe Windows hosts for RPC-related services and the ports they use, often including scripted checks to reveal open ports and the exposed RPC endpoints. This makes it the right fit for enumerating open ports, because it focuses on discovering the services reachable through those ports. The other options are centered on DNS data—zone transfers pull DNS zone information, and dig or NSLookup perform DNS queries rather than port scanning—so they don’t address port enumeration.

Port enumeration is about identifying which network ports are open on a target and what services are listening on those ports. RPCScan is built to probe Windows hosts for RPC-related services and the ports they use, often including scripted checks to reveal open ports and the exposed RPC endpoints. This makes it the right fit for enumerating open ports, because it focuses on discovering the services reachable through those ports. The other options are centered on DNS data—zone transfers pull DNS zone information, and dig or NSLookup perform DNS queries rather than port scanning—so they don’t address port enumeration.