Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During the early footprinting phase, you are given only the target company's Internet domain and must identify the public IPv4 ranges it owns. Engagement rules forbid sending any packets toward the organization. Which approach best achieves this goal while remaining completely passive?

  • Look up the domain registrant in the appropriate RIR WHOIS database to view its assigned netblocks.

  • Perform an SNMP walk against the organization's perimeter router to enumerate interfaces and subnets.

  • Attempt a DNS zone transfer from the authoritative name server for the domain.

  • Run an Nmap ping sweep (-sn) against all addresses that resolve from the domain name.

Certified Ethical Hacker (CEH)
Reconnaissance Techniques
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