Which command line fragment correctly scans the top ports across a target list and saves the output in all formats?

Which command line fragment correctly scans the top ports across a target list and saves the output in all formats?

• A. Nmap --top-ports 100 -iL targets.txt -oN results
• B. Nmap -iL targets.txt --top-ports 100 -oX results
• C. Nmap --top-ports 100 -iL targets.txt -oA results
• D. Nmap --ports 1-100 -iL targets.txt -oN results

Answer: (C)

To scan the most commonly used ports across a target list and save every output format, this combination uses three key capabilities: selecting top ports, reading targets from a file, and writing all formats at once. The command picks the 100 most frequently used ports with --top-ports 100, reads the targets from a file with -iL targets.txt, and writes outputs in all major formats with -oA results. The top-ports option concentrates the scan on ports likely to be open, speeding up the process while still giving useful coverage. Reading targets from a file lets you batch-scan many hosts in one go. The -oA flag saves three formats—normal, XML, and a grepable output—using the base filename so you get results.nmap, results.xml, and results.gnmap automatically. Other options either save only a single format or scan a specific port range, which doesn’t meet the requirement of all formats and the top-port approach.

To scan the most commonly used ports across a target list and save every output format, this combination uses three key capabilities: selecting top ports, reading targets from a file, and writing all formats at once. The command picks the 100 most frequently used ports with --top-ports 100, reads the targets from a file with -iL targets.txt, and writes outputs in all major formats with -oA results. The top-ports option concentrates the scan on ports likely to be open, speeding up the process while still giving useful coverage. Reading targets from a file lets you batch-scan many hosts in one go. The -oA flag saves three formats—normal, XML, and a grepable output—using the base filename so you get results.nmap, results.xml, and results.gnmap automatically. Other options either save only a single format or scan a specific port range, which doesn’t meet the requirement of all formats and the top-port approach.