端口适配器或网络模块。

Port adapter or network module.

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只有当应用程序启动时，资源适配器才能验证类似于主机名称和端口号这样的属性是否正确。

Only when the application starts can the resource adapter verify whether properties such as host names and port Numbers are correct.

youdao

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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