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An example of the prvalence of duplicate ping packets comes from PingER measurements on March 31st 2012 to 703 hosts in over 600 countries. Of these hosts 15 responded with duplicate pings. For 13 of the 15 hosts it occured on both 100 and 1000 Byte pings. Out of 10 pings sent 6 hosts had 1 ping duplicated, 5 had 2 pings duplicated, 2 had 4 pings duplicated, 1 had 3 pings duplicated and 1 returned 12 pings for each ping sent. The sites of the hosts range from national labs (CERN, IHEP SU), developed countries (Israel), developing countries (Burkina Faso, Malawi, Mauritius, Sierra Leone, Swaziland, Zambia), and educational sites (SDSC).
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