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.

为采集该数据集，研究人员开展了全网范围的IP地址扫描。对于互联网编号分配机构（IANA）分配的所有IP地址段中的每个地址，均通过发送ICMP回显请求（ICMP ECHO_REQUEST，即PING）数据包进行一次探测。若收到响应（ICMP ECHO_REPLY，即ICMP回显应答），则将对应的IP地址记录至本数据集。本次实验共探测了超过25亿个不同的IP地址。