您没有提及您使用的操作系统。从输出来看,我猜你正在使用某种 Linux 版本。
字符 [-AaDdfnoQqRrv] 是 Ping 命令的可能参数。Ping -h 只给出一个非常基本的帮助信息。我建议您阅读手册(又名手册页),您可以通过在命令行(在基于 *nix 的系统上)中键入以下内容来找到它。
man ping
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它将为您提供更多信息,例如:
OPTIONS
-a Audible ping.
-A Adaptive ping. Interpacket interval adapts to round-trip time, so that effectively not more than one (or more, if preload is
set) unanswered probe is present in the network. Minimal interval is 200msec for not super-user. On networks with low rtt this
mode is essentially equivalent to flood mode.
-b Allow pinging a broadcast address.
-B Do not allow ping to change source address of probes. The address is bound to one selected when ping starts.
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