How best to configure for hosts that require static ip addresses?

What would be the best approach to support name resolution for servers on the LAN that require a static ip address, for example a file server?

I ran a few tests to see if dnsmasq would accept a DNS registration transaction from a server on our LAN configured with a static ip address, and it did not.

I'm thinking that /jffs/configs/hosts.add file is where I should put static ip addresses.

Are there other options?