312-50V11 · Question #216
Emil uses nmap to scan two hosts using this command: nmap -sS -T4 -O 192.168.99.1 192.168.99.7 He receives this output: What is his conclusion?
The correct answer is B. He performed a SYN scan and OS scan on hosts 192.168.99.1 and 192.168.99.7. The nmap command uses -sS for a TCP SYN scan and -O for OS fingerprinting against both listed hosts, making B the only conclusion directly supported by the command syntax.
Question
Emil uses nmap to scan two hosts using this command:
nmap -sS -T4 -O 192.168.99.1 192.168.99.7 He receives this output:
What is his conclusion?
Exhibit
Options
- AHost 192.168.99.7 is an iPad.
- BHe performed a SYN scan and OS scan on hosts 192.168.99.1 and 192.168.99.7
- CHost 192.168.99.1 is the host that he launched the scan from.
- DHost 192.168.99.7 is down.
How the community answered
(41 responses)- A2% (1)
- B85% (35)
- C7% (3)
- D5% (2)
Why each option
The nmap command uses -sS for a TCP SYN scan and -O for OS fingerprinting against both listed hosts, making B the only conclusion directly supported by the command syntax.
OS fingerprinting estimates the operating system but cannot reliably identify a specific device model such as an iPad without additional context not shown in the command.
The -sS flag instructs nmap to perform a SYN (half-open) scan, and the -O flag enables OS detection via TCP/IP stack fingerprinting. The command explicitly targets both 192.168.99.1 and 192.168.99.7, so the factual conclusion is that a SYN scan and OS scan were run on both hosts.
Nothing in the nmap command or its flags indicates that 192.168.99.1 is the scanning host; nmap scans any reachable address, including ones on the same subnet as the scanner.
If 192.168.99.7 were down, nmap would explicitly report the host as down; the question states output was received, implying the host responded.
Concept tested: nmap SYN scan and OS detection flags interpretation
Source: https://nmap.org/book/man-briefoptions.html
Topics
Community Discussion
No community discussion yet for this question.
