ally representing either the IPv4 or IPv6
                  version of an internet protocol.
                </p></dd>
<dt><span class="term">host</span></dt>
<dd><p>
                  A string identifying a location. May be a descriptive name or a
                  numeric address string. If an empty string and the passive flag
                  has been specified, the resolved endpoints are suitable for local
                  service binding. If an empty string and passive is not specified,
             