Question : HOSTS File - FQDN or simply host name?

When entering a IP/Host combo into the HOSTS file, which entry format is correct, the FQDN or the host name?

Is this correct?

10.20.2.1     server1.local

Or, is this correct?

10.20.2.1     server1

Answer : HOSTS File - FQDN or simply host name?

both can be don, to make it clear for your self use the full FQDN but it would work fine without