2019年网络规划设计师上午真题（六）

51、某学校为学生宿舍部署无线网络后，频繁出现网速慢、用户无法登陆等现象，网络管理员可以通过哪些措施优化无线网络（ ）。

①AP功率调整②人员密集区域更换高密AP③调整宽带④干扰调整⑤馈线入户

A、 ①②

B、 ①②③

C、 ①②③④

D、 ①②③④⑤

52、服务虚拟化使用分布式存储，与集中共享储存相比，分布式存储（ ）。

A、虚拟机磁盘IO性能较低

B、建设成本较高

C、可以实现多副本数据冗余

D、网络带宽要求低

53、某网络建设项目的安装阶段分为A、B、C.D四个活动任务，各任务顺次进行，无时间上重叠，各任务完成时间估计如下图所示，按照计划评审技术，安装阶段工期估算为（ ）天。

A、31

B、51

C、53

D、83

54、IPsec,also known as the internet Protocol( )，defines the architecture for security services for IP network traffic IPsec describes the framework for providing security a the IP layer,as well as the suite of protocols designed to provide that security:through_( )_and encryption of IP network packets.IPec can be used 10 protect network data,for example,by setting up circuits using IPsec( ),in which all data being sent between two endpoints is encrypted,as with a Virtual( )Network connection ;for encrypting application layer data ;and for providing security for routers sending routing data across the public internet.Internet traffic can also be secured from host to host without the use of lPsec,for example by encryption at the( )layer with HTTP Secure(TTPS)or an the transport layer wit the Transport Layer Security (TLS)protocol.

A、Security

B、Secretary

C、Secret

D、Secondary

A、encoding

B、authentication

C、decryption

D、packaging

A、 channel

B、 path

C、 tunneling

D、 route

A、pubic

B、private

C、personal

D、proper

A、network

B、transport

C、application

D、session