フリー問題

問題文

A client connects to a four-node Oracle RAC database using the single client access name and a service name. Which description of the path that the connection takes is correct?

選択肢

1. The client reaches the node of the cluster listener of the least loaded node directly, that listener asks the single client access name listener which instance offers the service, and the session is then connected to the instance that the answer names.
2. The client reaches one of the addresses of the single client access name, that listener decides which instance offers the service and hands the request to the node of the cluster listener there, and the node listener connects the session to the instance on its own node.
3. The client reaches one of the addresses of the single client access name, the database instance registers the session in the cluster registry, and the node listener reads the registry afterwards to complete the connection.
4. The client reaches one of the addresses of the single client access name, that listener connects the session to an instance on its own node, and the node listener is used solely when the single client access name cannot be resolved by the name service at all.