Oracle versions

We are a moroccan society.

Our architecture can be described as mentionned below:
- an HP9000 server where is installed Oracle 7.2.

• a Net server with oracle 7.0.16
• Client machines where is insatalled oracle 6.0. All these versions require the SQL Net v1.

We wish receiving answers about the two below questions:

1. We wish to implemant Oracle 7.3 in the HP9000 and net servers. Is that possible knowing that this oracle version require SQL Net v2?
2. We use actually SCO-Unix 4.2 R 3.2. Is it necessary to migrate to SCO-Unix v5 if we replace Oracle 7.0.16 by Oracle 7.3 ?

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