OCP-1Z0-052-V8.02-131题

131. Which naming method uses the tnsnames.ora file to store the connect descriptor used by the client

while connecting to the database instance from a remote machine?

A.host naming method

B.local naming method

C.external naming method

D.directory naming method

Answer: B  

答案解析：

参考：http://docs.oracle.com/cd/E11882_01/network.112/e41945/naming.htm#NETAG1128

Configuring the Local Naming Method

The local naming method adds net service names to the tnsnames.ora file. Each net service name maps to a connect descriptor.

Example 8-2 shows the net service name sales mapped to the connect descriptor contained in DESCRIPTION. The DESCRIPTION section contains the protocol address and identifies the destination database service. In this example, the protocol is TCP/IP and the port is 1521.

Example 8-2 Connector Descriptor

sales=

(DESCRIPTION=

  (ADDRESS=(PROTOCOL=tcp)(HOST=sales-server)(PORT=1521))

  (CONNECT_DATA=

     (SERVICE_NAME=sales.us.example.com)))

Example 8-3 shows a valid tnsnames.ora entry to connect to a host identified with an IPv6 address and a port number of 1522.

Example 8-3 Connect Descriptor for IPv6 Connection

salesdb =

  ( DESCRIPTION =

    ( ADDRESS=(PROTOCOL=tcp)(HOST=2001:0DB8:1:1::200C:417A)(PORT=1522) )

    ( CONNECT_DATA =

        (SERVICES_NAME=sales.example.com) )

  )