Encryption of sql*net packets between client and server
Is there a document that answers the following questions about the encryption of network traffic between client and server and also between two servers over a database link during connection, DML and data sets being returned?
1) When Oracle started encrypting all network traffic?
2) Is the network traffic encrypted for queries over database links?
3) If one logs in with a user/password what encryption is used?
I am looking to determine if the existing encryption of database link connections and queries is sufficient or if I have to use advanced security options such as Oracle Internet Directory.
Thanks and best regards,