what is true regarding the role Oracle Net provides in a client server connection with no middle tier? (Choose two)
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Oracle Net is layered on top of the network protocol.
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Oracle Net must reside on both the client and the server for peer-to-peer communication to occur.
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On the client side, Oracle Net is responsible for working with the listener to receive incoming connection requests.
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On the server side, Oracle Net is responsible for several connectivity issues such as : the location of the server, whatever one or more protocol is involved in the connection, and how to handle exception and interrupts.
Oracle Net sits on top of the standard network protocol (A) and must be installed on both client and server (B) for peer-to-peer communication. The listener handles incoming connections on the server side, not Oracle Net directly.
In a two-tier client/server setup with no middle tier, Oracle Net sits above the underlying network transport protocol (like TCP/IP) to establish and manage the connection, so it must be present on both the client and the server for either side to speak the same connection protocol to the other. Without Oracle Net installed on both ends, the peer-to-peer session negotiation Oracle Net performs simply can't happen.