Question

Adam's port scan returns results on six TCP ports: 22, 80, 443, 515, 631, and 9100. If Adam needs to guess what type of device this is based on these ports, what is his best guess?

A. A web server
B. An FTP server
C. A printer
D. A proxy server

Answer 1

The device Adam scanned is likely a printer due to the presence of multiple ports associated with printing protocols (515, 631, 9100). While ports 22, 80, and 443 suggest SSH and web server capabilities, the specificity of the printing ports makes a printer the most probable answer.

Step-by-step explanation:

Adam's port scan returned results on ports that are commonly used for different protocols. Port 22 is commonly used for SSH (Secure Shell) for secure access, port 80 for HTTP, which is used by web servers, and port 443 for HTTPS, also used by web servers but for secure communication. Port 515 is for the Line Printer Daemon Protocol (LPD), used for network printing, port 631 is for the Internet Printing Protocol (IPP), and port 9100 is commonly used for direct-printing to printers. Given these ports, Adam's best guess would be that the device is likely a printer because it has multiple printing-related ports open.