-
-4 (IPv4 only)
Force the use of IPv4 only. -
-6 (IPv6 only)
Force the use of IPv6 only. -
-U,
--unixsock (Use Unix domain sockets)
Use Unix domain sockets rather than network sockets.
This option may be used on its own for stream sockets, or
combined with --udp for datagram sockets.
A description of -U mode is in
the section called “Unix Domain Sockets”. -
-u,
--udp (Use UDP)
Use UDP for the connection (the default is TCP). -
--sctp (Use SCTP)
Use SCTP for the connection (the default is TCP).
SCTP support is implemented in TCP-compatible mode.
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