某高校计划采用扁平化的网络结构。为了限制广播域、解决VLAN资源紧缺的问题，学校计划采用QinQ(802.1Q-in-802.1Q)技术对接入层网络进行端口隔离。以下关于QinQ技术的叙述中，错误的是()。
- A.一旦在端口启用了QinQ，单层VLAN的数据报文将没有办法通过
- B.QinQ技术标准出自IEEE?802.1aD
- C.QinQ技术扩展了VLAN数目，使VLAN的数目最多可达4094×4094个
- D.QinQ技术分为基本QinQ和灵活QinQ两种
正确答案及解析
正确答案
解析
QinQ是在传统IEEE?802.1Q?VLAN标签头的基础上，增加一层新的IEEE?802.1Q?VLAN标签头。由于在骨干网中传递的报文有两层802.1Q?Tag，称之为QinQ协议。QinQ数据帧带着两层标签穿越运营商网络，内层标签透明传送，也可以看作是一种简单、实用的VPN技术。QinQ技术标准出自IEEE?802.1ad。QinQ技术扩展了VLAN数目，使VLAN的数目最多可达4094×4094个。QinQ技术分为基本QinQ和灵活QinQ两种。
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