what is nmap looking at when it conducts a version scan? a ip id and tcp sequence number fields b tcp and ip…

what is nmap looking at when it conducts a version scan? a ip id and tcp sequence number fields b tcp and ip headers c application banners d operating system kernel
Answer
Brief Explanations:
Nmap's version scan sends probes to open ports and examines the application - level banners returned by services listening on those ports to determine the service name and version number.
Answer:
C. Application banners