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Exam 312-50v11 topic 1 question 48 discussion

Actual exam question from ECCouncil's 312-50v11
Question #: 48
Topic #: 1
[All 312-50v11 Questions]

You are attempting to run an Nmap port scan on a web server. Which of the following commands would result in a scan of common ports with the least amount of noise in order to evade IDS?

  • A. nmap -A - Pn
  • B. nmap -sP -p-65535 -T5
  • C. nmap -sT -O -T0
  • D. nmap -A --host-timeout 99 -T1
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Suggested Answer: C 🗳️

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Scryptic
Highly Voted 2 years, 8 months ago
nmap -sT -O -T0 -sT = TCP connect port scan -O = Enable OS detection using TCP/IP stack fingerprinting -T0 = Paranoid
upvoted 10 times
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tille
Highly Voted 2 years, 11 months ago
C is the correct, uses the -T0 switch to slow down the scan. A and D are kind of noisy because of the -A switch. B is also fast and visible - because of the -T5
upvoted 7 times
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sudowhoami
Most Recent 7 months, 1 week ago
Selected Answer: C
C is the correct answer.
upvoted 1 times
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DataTraveler
7 months, 1 week ago
Selected Answer: C
Optimize Timing Parameters To control the scan activity, Nmap provides the -T option for scanning ranging from high-level to low-level timing aggressiveness. This can be extremely useful for scanning highly filtered networks. p.332/316
upvoted 1 times
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Novmejst
2 years, 4 months ago
C. nmap -sT -O -T0
upvoted 1 times
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Nassman
2 years, 5 months ago
All the options are noisy and can get you detected, but -T0 is very slow and packets are sent at a very slow rate, packets per minute and not several per second. It is the least worst answer.
upvoted 4 times
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[Removed]
2 years, 11 months ago
-T0 : paranoid , very slow and stealthy scan timing.
upvoted 3 times
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Jez2021
3 years ago
NMAP Switches/Options: https://nmap.org/book/man-briefoptions.html
upvoted 3 times
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C (25%)
B (20%)
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