internet_outage_adaptive_a32e-20180401 (04/01/2018 to 07/01/2018)

To collect this data, all allocated and responsive Internet IP address blocks were pinged by sending ICMP ECHO_REQUEST (PING) packet. The block status was recorded in this data set. Probe was repeated every 11 minutes, and more quickly when uncertain about block status. In all, approximately 3.5M /24 subnets were periodically probed.为构建本数据集，研究人员向所有已分配且可响应的互联网IP地址块发送网际控制报文协议回显请求（ICMP ECHO_REQUEST，即PING）数据包开展ping探测，并将该地址块的状态记录于本数据集之中。探测任务每11分钟执行一次，当无法确认地址块状态时会提升探测频次。最终，累计对约350万个/24子网完成了周期性探测。