HDLC协议中，帧的编号和应答号存放在（ ）字段中。
- A.标志
- B.地址
- C.控制
- D.数据
正确答案及解析
正确答案
解析
HDLC帧格式包括了帧头（标志字段）、地址字段、控制字段、信息字段、FCS字段、帧尾（标志字段）等6个字段。A选项，帧头和帧尾标志字段是固定的“01111110”；B选项，地址字段携带主站或从站地址；C选项，HDLC定义了3种不同的帧，可以根据控制字段区分，信息帧（l帧）的发送编号和应答号存放在控制字段，分别占用3bit位；信息（数据）字段用于承载数据。
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