What is telnet?
Telnet is an application (e.g. client/server) that provides terminal access to servers, local area networks, or other computers on the same network.  In the early days telnet was a service offering through the windows operating system.  Telnet has two core components: the communication protocol and the application that offers the communication protocol service.
O que é o telnet?
Telnet é um aplicativo (por exemplo, cliente/servidor) que fornece acesso terminal a servidores, redes de área local ou outros computadores na mesma rede.