internet_address_survey_it5-20050225 (02/25/2005 to 04/07/2005)

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.为构建该数据集，研究团队开展了一次全球互联网范围的IP地址扫描实验。针对互联网编号分配机构（Internet Assigned Numbers Authority, IANA）分配的所有IP地址段中的每一个IP地址，实验均通过发送网际控制报文协议回显请求（ICMP ECHO_REQUEST，即PING）数据包完成一次探测。若接收到对应的网际控制报文协议回显应答（ICMP_ECHO_REPLY）数据包，则将该IP地址收录至本数据集。本次实验总计探测了超过25亿个独立IP地址。