internet_address_survey_reprobing_it77w-20170830 (08/30/2017 to 09/14/2017)

To collect this data, a subset of Internet IP addresses was pinged by sending ICMP ECHO_REQUEST (PING) packet. The response (if it ever came within 11 minutes time interval) was recorded in this data set. Probe was repeated every 11 minutes. In all, 40493 netblocks (/24 subnets) were periodically reprobed.为构建该数据集，研究人员通过发送网际控制报文协议回显请求（ICMP ECHO_REQUEST，即PING）数据包，对一部分互联网IP地址开展PING探测操作。若在11分钟的时间窗口内收到响应，则将该响应记录至本数据集。该探测任务每11分钟重复执行一次。总计共有40493个网络块（/24子网）被周期性地重复探测。