f several parts:</P>
<DL>
<DT>
<STRONG>
Domain</STRONG>
</DT><DD>The network over which the connection is being made. Domains include TCP/IP, IRLAP, and &quot;loopback&quot; (used for connections between two threads on the same machine).</DD>
<DT>
<STRONG>
Address Data</DT><DD>
</STRONG>
This data identifies a machine on a network domain. The format of the address depends on the domain. In the case of TCP/IP, a sample address might be the string &quot;geoworks.com&quot;. IrLAP addresses are 32-bit numbers. 