internet_address_survey_reprobing_it45c-20120114 (01/14/2012 to 01/28/2012)

University Of Southern California-Information Sciences Institute
To collect this data, a subset of Internet IP addresses was pinged by sending ICMP ECHO_REQUEST (PING) packet. The response (if it ever came within 11 minutes time interval) was recorded in this data set. Probe was repeated every 11 minutes. In all, 40281 netblocks (/24 subnets) were periodically reprobed.
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