（ ）制定了无线局域网访问控制方法与物理层规范。
- A.IEEE 802.3
- B.IEEE 802.11
- C.IEEE 802.15
- D.IEEE 802.16
正确答案及解析
正确答案
解析
IEEE802系列标准是IEEE802LAN/MAN标准委员会制定的局域网、城域网技术标准，其中：IEEE802.3网络协议标准描述物理层和数据链路层的MAC子层的实现方法，在多种物理媒体上以多种速率采用CSMA/CD访问方式；对于快递以太网，该标准说明的实现方法有所扩展，该标准通常指以太网。IEEE802.11是无线局域网通用的标准，它是由IEEE所定义的无线网络通信的标准，该标准定义了物理层和媒体访问控制（MAC）协议的规范。IEEE802.15是由IEEE制定的一种蓝牙无线通信规范标准，应用于无线个人区域网（WPAN）。IEEE802.16是一种无线宽带标准。应选择B。
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