--- service: i.root-servers.net start-period: '2014-11-21T00:00:00Z' end-period: '2014-11-22T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3220724231 dns-udp-queries-received-ipv6: 226000913 dns-tcp-queries-received-ipv4: 6596180 dns-tcp-queries-received-ipv6: 187064 dns-udp-responses-sent-ipv4: 3169963013 dns-udp-responses-sent-ipv6: 225914538 dns-tcp-responses-sent-ipv4: 6695708 dns-tcp-responses-sent-ipv6: 186471