61、下列协议中，不属干TCP/IP协议簇的是（  ）。

A、 CSMA/CD

B、 IP

C、 TCP

D、 UDP

62、浏览器开启无痕浏览模式后，（  ）依然会被保存下来。

A、浏览历史

B、搜索历史

C、已下载文件

D、临时文件

63、下列网络互连设备中，工作在物理层的是（  ）。

A、交换机

B、集线器

C、路由器

D、网桥

64、当出现网络故障时，一般应首先检查（  ）。

A、系统病毒

B、路由配置

C、物理连通性

D、主机故障

65、(   ) can help organizations to better understand the information contained within the data and will also help identify the data that is most important to the business and future business decisions.

A、 Data processing system

B、 Big Data analytics

C、 Cloud computing

D、 Database management

66、After analyzing the source code, (   ) generates machine instructions that will carry out the meaning of the program at a later time.

A、 an interpreter

B、 a linker

C、 a compiler

D、 a converter

67、algorithm specifies the way to arrange data in a particular order.

A、 Search

B、 Random

C、 Sorting

D、 Merge

68、As each application module is completed, it undergoes (   ) to ensure that it operates correctly and reliably .

A、 unit testing

B、 integration testing

C、 system testing

D、 acceptance testing

69、(   ) is the process of transforming information so it is unintelligible to anyone but the intended recipient.

A、 Encryption

B、 Decryption

C、 Security

D、 Protection