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Question:

A penetration tester is performing a port scan on a particular host. The tester discovered multiple ports open, which made determining the Operating System (OS) version installed confusing. Considering the NMAP result below, which of the following is likely to be installed on the target machine by the OS? NMAP 5.21 was launched on March 15, 2011, at 11:06 a.m. The NMAP scan report for 172.16.40.65 Host is now available (1.00s latency). Not depicted: 993 ports have been closed. SERVICE OF THE STATE OF PORT 21/tcp open ftp 23/tcp open telnet 80/tcp open http 139/tcp open netbios-ssn 515/tcp open 631/tcp open ipp 9100 MAC Address: 00:00:00:48:00D:EE:8

A The host is likely a printer.
explanation