如下图，一名管理员ping默认网关发现如下输出，最有可能是那一层OSI出问题？（）
A: data link layer
B: application layer
C: access layer
D: session layer
E: network layer
A: data link layer
B: application layer
C: access layer
D: session layer
E: network layer
举一反三
- Point to Point Protocol is a _______________. A: session layer Protocol B: transport layer Protocol C: data link layer Protocol
- The WDM transmission network consists of three layers: Physical Layer、Data Link Layer and Network Layer.
- The IoT system consists of three layers:, and A: sensing layer B: transport layer C: network layer D: application layer
- ISO/OSI七层模型中，提供端到端的透明数据传输服务，差错控制和流量控制的层是（ ） A: Physical Layer B: Network Layer C: Transport Layer D: Session Layer
- In the seven-layer OSI network architecture, ( ) layer is on point-to-point basis A: Network B: Transport C: Session D: Application