Question : Accessing with Hostname/FQDN/IP address

Accessing with Hostname/FQDN/IP address

I would like to know if DNS is used when accessing a share in a remote computer (Samba) using:

\\IPaddress\sharename
\\computername\sharename
\\computername.domainname\sharename

I have some computers that start recently having issue accessing the share using:

\\computername\sharename

But able to access the share using:

\\computername.domainname\sharename
\\IPaddress\sharename

the issue just started recently and there is nothing in the Logs about this issue

Any idea?

Thanks

Answer : Accessing with Hostname/FQDN/IP address

Both attempts should use dns.  Do you get any differences when you try:
nslookup computername
vs.
nslookup computer.domainname

Do you have multiple dns records in your dns server for the same computer name?