None of them documented -4, -6, -noagent, or -agent.
Ask document 'plink -nc host:port'.
\dd Force use of SSH protocol version 2.
+\dt \cw{-4}, \cw{-6}
+
+\dd Force use of IPv4 or IPv6 for network connections.
+
\dt \cw{-C}
\dd Enable SSH compression.
a \e{public} key here (in RFC 4716 or OpenSSH format), to identify
which of the agent's keys to use. }
+\dt \cw{\-noagent}
+
+\dd Don't try to use an authentication agent for local authentication.
+(This doesn't affect agent forwarding.)
+
+\dt \cw{\-agent}
+
+\dd Allow use of an authentication agent. (This option is only necessary
+to override a setting in a saved session.)
+
\dt \cw{\-hostkey} \e{key}
\dd Specify an acceptable host public key. This option may be specified
\dd Don't start a remote command or shell at all (SSH-2 only).
+\dt \cw{\-nc} \e{host}:\e{port}
+
+\dd Make a remote network connection from the server instead of
+starting a shell or command.
+
\dt \cw{\-sercfg} \e{configuration-string}
\dd Specify the configuration parameters for the serial port, in
\dd Force use of SSH protocol version 2.
+\dt \cw{-4}, \cw{-6}
+
+\dd Force use of IPv4 or IPv6 for network connections.
+
\dt \cw{-C}
\dd Enable SSH compression.
a \e{public} key here (in RFC 4716 or OpenSSH format), to identify
which of the agent's keys to use. }
+\dt \cw{\-noagent}
+
+\dd Don't try to use an authentication agent.
+
+\dt \cw{\-agent}
+
+\dd Allow use of an authentication agent. (This option is only necessary
+to override a setting in a saved session.)
+
\dt \cw{\-hostkey} \e{key}
\dd Specify an acceptable host public key. This option may be specified
\dd Force use of SSH protocol version 2.
+\dt \cw{-4}, \cw{-6}
+
+\dd Force use of IPv4 or IPv6 for network connections.
+
\dt \cw{-C}
\dd Enable SSH compression.
a \e{public} key here (in RFC 4716 or OpenSSH format), to identify
which of the agent's keys to use. }
+\dt \cw{\-noagent}
+
+\dd Don't try to use an authentication agent.
+
+\dt \cw{\-agent}
+
+\dd Allow use of an authentication agent. (This option is only necessary
+to override a setting in a saved session.)
+
\dt \cw{\-hostkey} \e{key}
\dd Specify an acceptable host public key. This option may be specified
\dd Specify the port to connect to the server on.
+\dt \cw{-4}, \cw{-6}
+
+\dd Force use of IPv4 or IPv6 for network connections.
+
\S{puttytel-manpage-saved-sessions} SAVED SESSIONS
Saved sessions are stored in a \cw{.putty/sessions} subdirectory in
\dd Select SSH protocol version 1 or 2.
+\dt \cw{-4}, \cw{-6}
+
+\dd Force use of IPv4 or IPv6 for network connections.
+
\dt \cw{\-i} \e{keyfile}
\dd Private key file for user authentication. For SSH-2 keys, this key
a \e{public} key here (in RFC 4716 or OpenSSH format), to identify
which of the agent's keys to use. }
+\dt \cw{\-noagent}
+
+\dd Don't try to use an authentication agent for local authentication.
+(This doesn't affect agent forwarding.)
+
+\dt \cw{\-agent}
+
+\dd Allow use of an authentication agent. (This option is only necessary
+to override a setting in a saved session.)
+
\dt \cw{\-hostkey} \e{key}
\dd Specify an acceptable host public key. This option may be specified