本文探讨了Oracle数据库中LISTENER2监听器的状态输出，解析了静态注册实例与客户端连接数的相关信息，强调了状态未知表示静态注册，而建立的连接数为2。
134. View the Exhibit and examine the output.
Which two statements are true regarding the LISTENER2 listener? (Choose two.)
A.The ORCL instance is registered dynamically with the listener.
B.The ORCL instance is registered statically in the listener.ora file.
C.The number of current client connections handled by the service handler is two.
D.The total number of client connections handled so far by the service handler is two.
Answer: BD
答案解析：
状态UNKOWN即表明为静态注册，而established：2代表建立了两个链接。
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