internet_outage_adaptive_a28c-20170403 (04/03/2017 to 07/02/2017)

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，对所有已分配且可响应的互联网IP地址块执行ping探测，并将各地址块的状态记录于本数据集中。探测任务每11分钟重复一次，当无法确定地址块状态时则加快探测频率。本次累计周期性探测了约350万个/24子网。