Oracle OCP 19c 認證1Z0-082考試題庫（第3題）
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我要咨詢Oracle OCP 19c 認證1Z0-082考試題庫（第3題）-CUUG內部學員版082題庫解析
3.Which three statements are true about advanced connection options supported by Oracle Net for connection to Oracle Database instances? (Choose three.)
A. Connect Time Failover requires the use of Transparent Application Failover (TAF)
B. Source Routing requires the use of a name server
C. Source Routing enables the use of Connection Manager (CMAN) which enables network traffic to be routed through a firewall
D. Load Balancing can balance the number of connections to dispatchers when using a Shared Server configuration
E. Load Balancing requires the use of a name server
F. Connect Time Failover requires the connect string to have two or more listener addresses configured
Answer: CDF
Explanation:
Reference: http://docs.oracle.com/cd/E11882_01/network.112/e41945/advcfg.htm#NETAG013
(解析：
sales.us.example.com=
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=sales1-server)(PORT=1521))
(ADDRESS=(PROTOCOL=tcp)(HOST=sales2-server)(PORT=1521)))
(CONNECT_DATA=
(SERVICE_NAME=sales.us.example.com)))
不能使用連接時故障轉移或客戶端負載平衡設置源路由。源路由按順序連接到列表中的每個地址，而連接時間故障轉移和客戶端負載平衡則從列表中選擇一個地址。
連接負載平衡特性通過平衡多個分派器之間的活動連接數來提高連接性能。在 OracleReal Application Clusters(Oracle RAC)環境中，連接池負載平衡還可以平衡多個實例之間的活動連接數。
In a shared server configuration, a listener selects a dispatcher in the following order:
1. Least loaded node.
2. Least loaded instance.
3. Least loaded dispatcher for that instance.
In a dedicated server configuration, a listener selects an instance in the following order:
1. Least loaded node.
2. Least loaded instance.
