A penetration tester is conducting a port scan on a specific host. The tester found several
ports opened that were confusing inconcluding the Operating System (OS) version
installed. Considering the NMAP result below, which of the follow is likely to be installed on
the target machine by the OS? Starting NMAP 5.21 at 2011-03-15 11:06 NMAP scan report
for 172.16.40.65 Host is up (1.00s latency). Not shown: 993 closed ports PORT STATE
SERVICE 21/tcp open ftp 23/tcp open telnet 80 /tcp open http 139/tcp open netbios-ssn
515/tcp open 631/tec open ipp 9100/tcp open MAC Address: 00:00:48:0D:EE:8
A The network protocol is configured to use SMB Signing.
B The physical network wire is on fibre optic cable.
C The network protocol is configured to use IPSEC.
D L0phtCrack SMB filtering only works through Switches and not Hubs.