Oracle Net Configuration Assistant is a post-installation tool that configures basic network components after installation. Which four components are included in the configuration？（）

• A、Directory server
• B、Hostname adaptor
• C、TCP/IP host file
• D、Connection Manager
• E、connecting pooling
• F、external procedures
• G、listener names and protocol addresses
• H、Net Service names in a tnsnames.ora file
• I、naming methods the client uses to resolve connect identifiers