中国DOS联盟

C:\test>telnet /?

telnet [-a][-e escape char][-f log file][-l user][-t term][host [port]]
-a      Attempt automatic logon. Same as -l option except uses
         the currently logged on user's name.
-e      Escape character to enter telnet client prompt.
-f      File name for client side logging
-l      Specifies the user name to log in with on the remote system.
         Requires that the remote system support the TELNET ENVIRON option.
-t      Specifies terminal type.
         Supported term types are vt100, vt52, ansi and vtnt only.
host    Specifies the hostname or IP address of the remote computer
         to connect to.
port    Specifies a port number or service name.