Oracle client side configuration for 12C

The client side need to do some configurations after Oracle 11g upgrade to 12C on Server in order to make database server is connectable. Before starting to configurate your clients, you have to get the below new server information from DBA

1. Host name
2. Port number
3. Service name
4. Your user name(usually it won’t be changed and replicated from old version)
5. Password(initial password for test connection then you need to update it)

and then you need to make a new connection strings to add it into ORA file(*.ora)