用户PC访问某域名时，进行域名解析的第一步是（）。

A. 地址

B. 端口

C. 地址+端口

D. 都不对

A. /boot/fstab 

B. /etc/fstab 

C. /var/fstab 

D. bin/fstab

A. 边缘，运维，运营 

B. 边缘，运营，运维 

C. 集中，运维，运营 

D. 集中，运营，运维

Scope , complexity ,and scale of even a single 5G netwoork are massively largherthan in today's networks .The main challenge is automation on all levels of the 5G eco system.without it , the network simply will not work; nei ther for the anticipated scale nor for the desired functional complexity .

Fundamentally , automation is realized bya largely self-governed network bound to varying business goals : ifs configuration , its services , how they are provided , and how it is managed . A governance model , ideally realized by policies , defines how these goals are implenented andmoni tored . Those policies can be low-level confi gurati on parameters , mid -level strategies or high-level intents and goals . Using a mix of these -policies implies translation between : top-down for realization and bottom-up for action / benefit and validation purposes .

Networks and models must address multiple , diverse constituencies . Human intervention should be kept to a minimum ( oversight ) . Managenment means monitoring and repair ; not control . Classic self capabilities are the benefits

1.The main challenge is ( )on all levels of the 5G eco-system

A．rate 

B.data 

C.automation 

D.managemont

2.A ( ) model , ideally realized by policies , defines how these goals are implemented and monitored

A．goverment

B.governance

C.automation

D.automatic

3.Human intorvention should be kepe on to a( )

A．minimum

B.monitoring

C.repair

D.control

4.The main idea of this shot article is( ) 

A． the main challenge of 5G 

B. the compexity of 5G network 

C. a automation model 

D. human intervention

A.内容分发网络(CDN)业务

B.互联网数据中心(IDC)业务

C.国内互联网虚拟专用网(IP-VPN)业务

D.互联网接入服务

A.启动

B.计划

C.执行

D.收尾

A.规则

B.合同

C.目标

D.需求

A.时间分集

B.频率分集

C.空间分集

D.极化分集

A.进度

B.造价

C.安全

D.质量

A.安全控制

B.进度控制

C.质量控制

D.投资控制