It is possible to switch off support for ping, and so you should ensure that you can reach the host before using it as a verification that a host is available.
对ping的支持可能会禁用，所以在使用ping检查主机是否可用之前应该确认能够访问此主机。
Company take service first, reliable quality, reasonable price as working principle to pull off support and trust of clients and society.
公司秉承服务第一、质量可靠、价格合理的经营原则，以赢得广大客户及社会的支持及信任。
Company take service first, reliable quality, reasonable price as working principle to pull off support and trust of clients and society.
公司秉承服务第一、质量可靠、价格合理的经营原则，以赢得广大客户及社会的支持及信任。
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