IEEE 802.3u规定的快速以太网物理层规范100BASE-FX 采用（）传输介质。
- A.5类UTP
- B.STP
- C.光纤
- D.红外
正确答案及解析
正确答案
解析
以太网比较常用的传输介质包括同轴电缆、双绞线和光纤三种，以IEEE 802.3委员会习惯用类似于“10Base-T”（由三个部分组成：10—速率，单位是Mbps；Base—传输机制，Base代表基带，Broad代表宽带；T—传输介质，T表示双绞线、F表示光纤、数字代表铜缆的最大段长）的形式来命名传输介质的选用方案，了解这些常见的方案是十分必要的。
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