Installing a NW65 SP6 server and don't know what to put in for DNS

We get our Internet Service through a local fiber optic provider and
they have assigned us 5 static ip addresses and the ips for their DNS
servers, but I can't figure out what to put in for the name of the DNS
server. Our ISP does not host any website for us so it doesn't seem
like I should use the name of their DNS server.

I would like to assign one of the static ips to a second nic on the 65
server to allow users to login to NetStorage from the internet.

Any suggestions will be greatly appreciated.

Thank you
David Dexter