internet_address_census_it54j-20130430 (04/30/2013 to 06/02/2013)

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，研究团队开展了一次覆盖全球互联网的IP地址扫描作业。针对互联网编号分配机构（Internet Assigned Numbers Authority, IANA）分配的地址段内的每一个IP地址，均通过发送ICMP ECHO_REQUEST（PING）数据包完成一次ping探测。若接收到ICMP_ECHO_REPLY（ICMP回声应答）响应，则将该IP地址记录至本数据集。本次实验累计探测了超过25亿个独立IP地址。