中继器的主要作用是( )。
- A.连接两个局域网
- B.路由选择
- C.延长网络传输距离
- D.数据交换
正确答案及解析
正确答案
解析
本题考查网络设备基础知识。
中继器是工作在物理层上的连接设备。适用于完全相同的两类网络互联,类似于烽火台的机制原理,对信号进行放大再生,以延长网络传输距离。故本题选C。(A、B、D选项都不属于中继器的功能,而是其特性)
中继器和集线器的区别:中继器和集线器同属于物流层设备。
中继器是在物流层实现局域网网段互联的,用于扩展局域网网段的长度。由于中继器只在两个局域网网段之间实现电气信号的恢复与整形,因此它仅用于连接相同的局域网。
集线器是一种特殊的多路中继器,也具有信号放大的功能。优点是当网络系统中的某条线路或某结点出现故障时不会影响网上其他结点的正常工作。
包含此试题的试卷
你可能感兴趣的试题
Advancements in ( )have contributed to the growth of the automotive industry through the creation and evolution of self-driving vehicles.
-
- A.Artificial Intelligence
- B.Cloud Computing
- C.Internet of Things
- D.Big Data
- 查看答案
In project human resource management , ( )is not a source of power for the project manager.
-
- A.referent power
- B.expert power
- C.reward power
- D.audit power
- 查看答案
At the project establishment stage , the feasibility study mainly includes techinical feasibility analysis , ( ), operation environment feasibility analysis and other aspects of feasibility analysis.
-
- A.detail feasibility analysis
- B.opportunity analysis
- C.economic feasibility analysis
- D.risk analysis
- 查看答案
( )is a grid that shows the project resources assigned to each work package.
-
- A.Stakeholder engagement assessment matrix
- B.Requirements traceability matrix
- C.Probability and impact matrix
- D.Responsibility assignment matrix
- 查看答案
Xinhua News Agency reported in January 2022,Chian will further promote the developmet of a digital economy during the 14th Five-Year Plan eriod(2021-2025). The plan also emphasized industrial ( )transformation.
-
- A.digital
- B.networking
- C.intelligentize
- D.informatization
- 查看答案