1.

FTP server listens for connection on which port number?(a) 20(b) 21(c) 22(d) 23The question was posed to me in an international level competition.The origin of the question is Ports in portion Networking of Computer Network

Answer»

The correct OPTION is (b) 21

To elaborate: Port 20 is used for FTP data. Port 22 is used for SSH REMOTE login. Port 23 is used for TELNET.



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