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CompTIA PenTest+ PT0-002 Practice Question

During an internal security assessment, a penetration tester needs to identify live hosts without performing a full port scan, to reduce network congestion. Which of the following Nmap options would be most appropriate for the tester to use to simply ping the hosts?

-sn
-p
-sV
-A

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Answer Description

The '-sn' option in Nmap is used to perform a host discovery, which simply pings the hosts without actually scanning any ports. This is the correct answer as it minimizes the amount of traffic and reduces the chance of causing network disruption. The '-sV' option executes a service version detection, which is more intrusive and creates more traffic, going beyond the requirement of just discovering live hosts. The '-A' option enables OS detection, version detection, script scanning, and traceroute, which would not only produce more traffic but also try to scan and fingerprint hosts, which is not needed in this scenario. The '-p' option specifies the target ports to scan, which does not directly relate to host discovery without port scanning.

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