312-50V10 · Question #825
If you want to only scan fewer ports than the default scan using Nmap tool, which option would you use?
The correct answer is B. 璅. The Nmap '-F' (fast) option limits the scan to the 100 most common ports instead of the default 1000, reducing scan scope and duration.
Question
If you want to only scan fewer ports than the default scan using Nmap tool, which option would you use?
Options
- A璻
- B璅
- C璓
- D璼P
How the community answered
(41 responses)- A2% (1)
- B88% (36)
- C7% (3)
- D2% (1)
Why each option
The Nmap '-F' (fast) option limits the scan to the 100 most common ports instead of the default 1000, reducing scan scope and duration.
The character shown in this choice is a rendering artifact and does not correspond to any valid Nmap flag for reducing the number of ports scanned.
The '-F' flag enables Nmap's fast scan mode, which restricts port scanning to the 100 most commonly used ports as defined in the nmap-services file, compared to the 1000-port default scan. This significantly reduces scan time and network traffic while still covering the highest-probability open ports. It is the standard Nmap option when a quicker, lower-volume scan with fewer ports is required.
The character shown in this choice is a rendering artifact and does not correspond to a valid Nmap option for limiting port scan scope.
The character shown in this choice is a rendering artifact and does not match the '-F' flag or any standard Nmap option used to scan fewer than the default number of ports.
Concept tested: Nmap fast scan mode with reduced port count
Source: https://nmap.org/book/man-port-specification.html
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