What is Putty?
Putty is a free and open-source application that can be used to connect or log in to a server using different protocols that includes, Telnet, SSH, SCP, rLogin. This terminal emulator can be installed in a Windows or Linux Operating System. To know more about Putty, click this LINK
You can download the application from Putty Official Site: https://www.putty.org/
Here’s an interface sample of the application:
This is an SSH connection to a server: