On Windows, it is used as SSH Clients to connect your Linux server or another purpose. It supports different type of Network Protocols such as SSH, FTP, SCP, Telnet etc. PuTTY is a great tool when it comes to the Best Terminal Emulator these days. PuTTY comes with command-line connection tool called Plink that is used for non-interactive moments.It can be connected to a sequential port as it supports several network protocols.PuTTY is sequential console and network data transfer app.It is free and open source terminal software.