... ICMP查点工具，利用它可以迅速确定目标网络里都存在着哪些活跃的系统。这个工具既可以发出传统的 ICMP ECHO数据包、也可以发出 ICMP TIME STAMP REQUEST和 ...
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The ICMP echo request failed because the source address and destination address that are specified in an ICMP echo message are not in the same scope.
由于ICM P回送消息中指定的源地址和目标地址不在同一范围内，ICM P回送请求失败。
This overload allows you to specify a time-out value for the operation and control fragmentation and Time-to-Live values for the ICMP echo message packet.
此重载允许您指定操作的超时值，并控制 ICMP 回显消息数据包的碎片和生存时间值。
Knowing this, imagine that an attacker constructs an ICMP echo message containing the spoofed source address of some arbitrary Host a, such as 192.168.2.2, in its header.
知道了这一点，假设攻击者构造了一条IC MP回应消息，它的头中包含伪造的任意主机a的源地址，如192.168.2.2。
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