internet_address_survey_reprobing_it68c-20160208 (02/08/2016 to 02/22/2016)

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.为构建本数据集，研究人员通过发送网际控制报文协议（Internet Control Message Protocol，简称ICMP）回显请求（ECHO_REQUEST，即PING）数据包，对部分互联网IP地址执行PING探测。若探测响应在11分钟的时间区间内返回，则将其记录至本数据集。该探测任务每11分钟重复执行一次，总计共对40493个网络块（/24子网）进行了周期性重探测。