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A Penetration Tester Wants to Script Out a Way to Discover

Question 18

Multiple Choice

A penetration tester wants to script out a way to discover all the RPTR records for a range of IP addresses. Which of the following is the MOST efficient to utilize?


A) nmap -p 53 -oG dnslist.txt | cut -d ":" -f 4
B) nslookup -ns 8.8.8.8 << dnslist.txt
C) for x in {1...254}; do dig -x 192.168.$x.$x; done
D) dig -r > echo "8.8.8.8" >> /etc/resolv.conf

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