fstype=smbfs just stated that the file system is of type SAMBA
credentials={secret encripted file here} in this file we find the encripted password of the user which is necessary in order to have access to the SAMBA facility on the SUN Server called smb.ifh.ee.ethz.ch
gid=350,uid=3532 have to match on both sides, i.e. on your Linux box as well as on the SUN server
://smb.ifh.ee.ethz.ch/rharbers is the address of the directory to be mounted under /data
You will then access it as /data/rharbers