internet_outage_adaptive_a35w-20190101 (2019-01-01 to 2019-04-01)

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.

为采集本数据集，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）数据包进行ping探测，并将各地址块的状态记录于本数据集。探测任务每11分钟执行一次循环，若对某地址块的状态存疑则提升探测频率。本次探测总计周期性扫描了约350万个/24子网。