A security engineer identified a new server on the network and wants to scan the host to determine if it is running an approved version of Linux and a patched version of Apache. Which of the following commands will accomplish this task?
The correct answer is C. nmap -A -T4 -p80 192.168.1.20.
The nmap command is used to scan networks and hosts to determine what services and versions are running. The -A option is used to enable OS and version detection, script scanning, and traceroute. The -T4 option sets the timing of the scan to the fastest possible speed. The -p80 option indicates that only port 80 should be scanned, which is the default port for HTTP. The IP address 192.168.1.20 is the address of the server to be scanned.
Option A, nmap -f -sV -p80 192.168.1.20, is incorrect because the -f option sets the packet fragmentation size, which is not necessary for this task.
Option B, nmap -sS -sL -p80 192.168.1.20, is incorrect because the -sS and -sL options are used to perform a TCP SYN and UDP scan, which is not necessary for this task.
Option D, nmap -O -v -p80 192.168.1.20, is incorrect because the -O option enables OS fingerprinting, which is not necessary for this task. The -v option enables verbose output, which is also not necessary.
nmap ג€"A ג€"T4 ג€"p80 192.168.1.20
This nmap command would instruct the tool to send a TCP SYN packet to port 80 of the IP address 192.168.1.20, with a time to live (TTL) value of 4. This command would be used to determine the open ports on the target IP address, as well as the operating system, service, and version information running on the target system.
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