MySQL 5.7 Release Notes
The MySQL server listens on a single network socket for TCP/IP
connections. This socket is bound to a single address, but it is
possible for an address to map onto multiple network interfaces.
To specify an address, set
at server startup, where
addr is an
IPv4 or IPv6 address or a host name. For details, see the
bind_address description in
Section 5.1.7, “Server System Variables”.