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Which of the following commands will allow you to return results using a SYN stealth scan for a class C subnet while also attempting to obtain the operating system running on each host on the subnet?
nmap -sS -O www.mydomain.org/24
nmap www.mydomain.org/24
nmap -sP www.mydomain.org/24
nmap -sV -v -p 139,445 www.mydomain.org/24
nmap -sS -O www.mydomain.org/24 will start a stealth SYN scan against each machine that is up out of the 256 IPs on the class C sized network where www.mydomain.org resides along with -O enables operating system detection.
nmap -sP www.mydomain.org/24 simply ping scans the network, listing machines that respond to ping.
nmap www.mydomain.org/24 scans an entire subnet but note NO switches for SYN or discovery of operating system
nmap -sV -v -p 139,445 www.mydomain.org/24 will find all Netbios servers on a subnet (-sV probes open ports to determine service/version info) (-p specifies ports i.e. 139,445 in this case)
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