如果你的物理连接按预期工作,但仍有问题,下一步该怎么做? If your physical connection is working as expected, but there is still a problem, what would be the next step?
A. 检查你的IP配置。 Check your IP configuration.
B. 给你的ISP打电话。 Call your ISP.
C. 重新启动网络上的所有设备。 Reboot all the devices on the network.
D. 拔掉电缆再插上。 Unplug cables and plug them back in.