Certified Ethical Hacker Version 11 (CEHv11) Practice Test

Which command scans the target IP address for an open NFS port (2049) and the NFS services running on it?

ntpdate ntpq rpcinfo ntptrace

Correct Answer:

rpcinfo

Explanation:

NFS runs over RPC, so to find an open NFS port and the services it provides you check the RPC service registry on the target. The tool that asks the registry (the portmapper) what RPC programs are registered, their versions, and which ports they listen on is ideally suited for this. By querying the target, you’ll see the NFS program (with its versions) and the port it’s using, which commonly appears as the NFS port 2049. This confirms both that NFS is available and exactly which port it’s on. Other options are focused on time synchronization or NTP-related tasks, not on discovering RPC-based services like NFS.

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