| topology | The host topology for this host. |
| port | Bind to specific port, if 0 is selected the port will chosen by OS. |
| ip | Bind to specific IP address. |
int Returns host ID just created.
Will create a host (open socket) with given topology and optionally port and IP.
An optional specific host IP address can be provided. This is usually only useful on servers where multiple internet accessible IP addresses might be available.