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单选题
DC1与本省各地市的DC2的连接方式是（ ）。
A
网状网
B
不完全网状
C
星形
D
直接连接
参考答案
参考解析
解析：
DC1之间以网状网相连，与本省各地市的DC2以星形方式连接；本省各地市的DC2之间以网状或不完全网状相连，同时辅以一定数量的直达电路与非本省的交换中心相连。
DC1之间以网状网相连，与本省各地市的DC2以星形方式连接；本省各地市的DC2之间以网状或不完全网状相连，同时辅以一定数量的直达电路与非本省的交换中心相连。
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单选题Your network contains an Active Directory domain. The domain contains two domain controllers named DC1 and DC2. DC1 hosts a standard primary DNS zone for the domain. Dynamic updates are enabled on the zone. DC2 hosts a standard secondary DNS zone for the domain. You need to configure DNS to allow only secure dynamic updates. What should you do first（）A
On DC1 and DC2， configure a trust anchor.B
On DC1 and DC2， configure a connection security rule.C
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填空题在长途网中，为了减少一次呼叫中的串接段数，可根据话务关系的密切程度和经济上的可行性，建立省间的DC1与DC2之间和省间的DC2之间的高效或（）。
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