Please confirm whether it is possible to upgrade from 10.2.0.4 Enterprise Edition (32 Bit) to 126.96.36.199 / 188.8.131.52 Standard Edition (64 Bit)
What is the sequence?
What are the limitations of migrating(upgrading) from Enterprise to Standard Edition? (10.2.0.4 Ent To 184.108.40.206/3 Std)?
Is it possible to export from 10.2.0.4 (32 bit - Ent edition) and import to 220.127.116.11 (64 bit - Std Edition) using Datapump (or) Export-Import
This is possible only if you are not using any of the EE options that are not present in SE - for example, partitioning.
See the list here - http://docs.oracle.com/cd/B19306_01/license.102/b14199/editions.htm#BABJICBB
You will need to perform a complete export from 10gR2 and then a complete import into a new created 11gR2 database. Pl see the link I posted in your duplicate post in this forum