While attempting to discover the remote operating system on the target computer, you receive the
following results from an nmap scan:

Remote operating system guess: Too many signatures match to reliably guess the OS.

Nmap run completed — 1 IP address (1 host up) scanned in 277.483 seconds
What should be your next step to identify the OS?

A.
Perform a firewalk with that system as the target IP

B.
Perform a tcp traceroute to the system using port 53

C.
Run an nmap scan with the -v-v option to give a better output

D.
Connect to the active services and review the banner information

Explanation:
Most people don’t care about changing the banners presented by applications listening to open
ports and therefore you should get fairly accurate information when grabbing banners from open
ports with,for example,a telnet application.