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?

  • 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.

  • 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.

Certified Ethical Hacker (CEH)
Reconnaissance Techniques
Your Score:
Settings & Objectives
Random Mixed
Questions are selected randomly from all chosen topics, with a preference for those you haven’t seen before. You may see several questions from the same objective or domain in a row.
Rotate by Objective
Questions cycle through each objective or domain in turn, helping you avoid long streaks of questions from the same area. You may see some repeat questions, but the distribution will be more balanced across topics.

Check or uncheck an objective to set which questions you will receive.

Wipe Score
Bash, the Crucial Exams Chat Bot
AI Bot