Logger, Routers, PG servers have mutiple NICs. The server itself will NOT do a DNS lookup for its own hostname So which IP address does it get when an application on the machine itself uses its own hostname?

It depends on teh Metrics of the NIC cards.

Set the Metric for the Visible NIC (Under IPV4 TCP/IP) to manual and “1”

Reference: https://social.technet.microsoft.com/Forums/office/en-US/de4492d9-75ca-4586-94f9-c0f959c02c75/ping-at-wrong-address?forum=winserverNIS