Message sending using SQL*NET

1. The number, sizes, and types of messages sent by the client and the server over a wired or wireless network to execute a procedure.
2. Does SQL Net use TCP or UDP?
3. Can SQL Net be configured to use UDP?
4. Is there a wireless SQL Net client that we can substitute for the standard client that will not require redevelopment of the application?
5. Has SQL Net ever been tested in unidirectional private RF environment?