You are connecting to an Oracle database server from a

单项选择题

You are connecting to an Oracle database server from a client by using the following connect string：
SQL> CONNECT hr/hr@pdserver.us.oracle.com：1521/proddb
Which naming method is being used in this case？（）

A.Local Naming
B.Easy Connect
C.External Naming
D.Directory Naming

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1Z0-042