04b1928e_t___import_utility__exp___imp___Description
[EXP Option] compress [Default value] N [Description] 
When “Y”, export will mark the table to be loaded as one extent for the import utility. If “N”, the current storage options defined for the table will be used. Although this option is only implemented on import, it can only be specified on export.
Oracle export / import utility (exp / imp)
Description