【单选题】
IMS是一个在分组域（PS）上的多媒体控制/呼叫控制平台，IMS使得（ ）具有电路域（CS）的部分功能，支持会话类和非会话类的多媒体业务。___
A. PS
B. CS
C. QS
D. ES
E.
F.
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答案
A
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olt在（ ） 这个字段来给每个ONU分配上行时隙，那么所有的ONU就可以按照一定的秩序发送自己的数据了，不会产生为了争夺时隙而冲突.___
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GPON系统的测距功能主要作用为（）___
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GPS天线安装后，通过终端观察BITS跟踪卫星情况，发现频繁丢失卫星现象，最有可能导致该现象的原因是（）___
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【多选题】
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【多选题】
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【多选题】
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C. Auto
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When upgrading a VMware vSAN cluster to version 6.5, which two tasks must be completed to comply with upgrade requirements and VMware-recommended best practices? (Choose two.)___
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【多选题】
What two enhancements are in VMFS6 but not in VMFS5? (Choose two.)___
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Which two statements describe why a vSphere DRS cluster would report load imbalance? (Choose two.)___
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【多选题】
A vSphere Administrator must ensure that vCenter Server service is running in a domain user account rather than Local System Account. To accomplish this, the user account should have which two permissions? (Choose two.)___
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