Domain Name System: Resolves domain names to corresponding IP addresses TCP Port 53 UDP Port 53
Category: Protocols
What is Telnet?
Telnet: Used to connect to a remote host (typically via a terminal emulator) TCP Port 23
What is SSH?
Secure Shell: Securely connect to a remote host (typically via a terminal emulator) TCP Port : 22
What is FTP?
File Transfer Protocol: Transfers files with a remote host (typically requires authentication of user credentials). TCP Port 20 and 21