A pen tester wants to discover the resource used for inbound communication at mainoffice.org in a single request. Which choice accomplishes that goal?
ping mainoffice.org
traceroute mainoffice.org
nslookup -type=mx mainoffice.org
dig -x mainoffice.org
Using the specialized option directs the request toward a record linked to inbound communication. The other selections reveal different information or focus on reverse addressing or path details. For instance, ping and traceroute examine connectivity, while a reverse lookup would not return the unique entry for inbound services.
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