<p>On IPv4, if <code>multicastInterface</code> is a valid address but does not match any
interface, or if the address does not match the family then
a <a href="errors.html#errors_class_systemerror"><code>System Error</code></a> such as <code>EADDRNOTAVAIL</code> or <code>EPROTONOSUP</code> is thrown.</p>
<p>On IPv6, most errors with specifying or omitting scope will result in the socket
continuing to use (or returning to) the system's default interface selection.</p>
<p>A socket's address family's ANY addre