The first is libzypp default (no option added to URL),
the second is the actual default used when mounting (so using this value is the same like passing no options),
the last one is the default + kerberos encryption (security option)

There is a problem how to display the default value. The problem is that if you don't specify the mount options libzypp will use "ro,nolock,soft,timeo=300" by default. But if you specify it then it's used **instead** of the default. So if you want to **add** one option you have to actually use "ro,nolock,soft,timeo=300" + &lt;option&gt;

Another problem is that the actual default is libzypp internal value (I got it looking into the log) and it might be possibly changed in the future so I do not won't to display it (that's the reason for the first "(default)" value).