internet_outage_adaptive_a39w-20200101 (2020-01-01 to 2020-04-01)

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ICMP ECHO_REQUEST（即PING）数据包以执行ping探测，并将该地址块的状态记录于本数据集内。探测任务每11分钟重复执行一次，当无法确认地址块状态时则会加快探测频率。总体而言，本次周期性探测共覆盖约350万个/24子网。