如果无法到达这个网关，那么从您主机上的网络适配器到网关的物理连接可能有问题（例如交换机端口、线路和网卡有故障）。

If it isn't, there may be a problem with the physical connection from the network adapter on your host to the gateway (for example, a faulty switch port, cable, network card).

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每台计算机的网络适配器，也就是网卡都有自己独特的网卡地址。

Each computer 's network adapter card is the card has its own unique address.

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