Connectivity Check-Loss of Continuity 连接检查
check connectivity 检查连接
Check Surface Connectivity 检查表面连通性
This is most likely a basic Internet connectivity check.
这可能是最基本的网络连通性检测。
These steps, however, may be useful if a client is available, to check connectivity to databases from a remote system.
但是，如果有客户机的话，这些步骤可能有助于检查远程系统到数据库的连接。
If a valid route exists to the host, and it's responding to pings but the application service is failing to respond, then you can check connectivity to the relevant ports using Telnet.
如果存在到主机的有效路由，而且它能够响应ping，但是应用服务没有响应，那么可以使用telnet检查到相关端口的连接。
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