internet_address_census_it51c-20121116 (11/16/2012 to 12/19/2012)

To collect this data, an Internet-wide IP address sweep was conducted. Every IP address in the ranges allocated by IANA was pinged once by sending ICMP ECHO_REQUEST (PING) packet. If the response (ICMP_ECHO_REPLY) came, its IP address was recorded in this data-set. In all, over 2.5 billion distinct IP addresses were probed during this experiment.

为采集本数据集，研究人员开展了全域互联网IP地址扫查实验。针对互联网编号分配机构（Internet Assigned Numbers Authority，IANA）分配的全部地址段内的每一个IP地址，均通过发送ICMP回声请求（PING）数据包完成一次探测。若接收到ICMP回声应答（ICMP_ECHO_REPLY），则将该IP地址记入本数据集。本次实验总计探测了超过25亿个唯一IP地址。