大數(shù)據(jù)就業(yè)實(shí)戰(zhàn)培訓(xùn) Oracle就業(yè)實(shí)戰(zhàn)培訓(xùn)
OCP 19c 1Z0-082認(rèn)證考試題庫(kù)（第3題）-CUUG內(nèi)部學(xué)員版082題庫(kù)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: https://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(shí)故障轉(zhuǎn)移或客戶(hù)端負(fù)載平衡設(shè)置源路由。源路由按順序連接到列表中的每個(gè)地址，而連接時(shí)間故障轉(zhuǎn)移和客戶(hù)端負(fù)載平衡則從列表中選擇一個(gè)地址。
連接負(fù)載平衡特性通過(guò)平衡多個(gè)分派器之間的活動(dòng)連接數(shù)來(lái)提高連接性能。在 OracleReal Application Clusters(Oracle RAC)環(huán)境中，連接池負(fù)載平衡還可以平衡多個(gè)實(shí)例之間的活動(dòng)連接數(shù)。
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.
CUUG與ORACLE公司建立最核心、最權(quán)威、最深層次的戰(zhàn)略合作伙伴關(guān)系；
CUUG是唯一一家只做DBA就業(yè)培訓(xùn)和oracle認(rèn)證的授權(quán)機(jī)構(gòu)，28年培養(yǎng)數(shù)萬(wàn)名oracle技術(shù)人才；
CUUG金牌講師授課，來(lái)自一線的資深ORACLE OCM技術(shù)專(zhuān)家團(tuán)隊(duì)；
CUUG頂尖完善的學(xué)習(xí)體系，以甲骨文原廠ORACLE數(shù)據(jù)庫(kù)核心技術(shù)為教學(xué)課程；