All information exchanged in a telnet session between a client and server is unencrypted and, for this reason, in the last years this application has been replaced by SSH, which provides the same type of service, but encrypted, as it’s based on the Secure Socket Layer (SSL) protocol.Īlthough telnet has become obsolete for remote administration purposes this application is still widely used to verify connectivity to remote services that are based on TCP. ![]() By default, a telnet server listens on port 23 for incoming connections from clients. This application is based on the connection-oriented Transmission Control Protocol (TCP). ![]() Network and system administrators use this application to configure and administer network devices such as servers, routers, switches, etc. Telnet is an application that is used to connect to a remote host’s command line terminal interface.
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