--- service: i.root-servers.net start-period: '2015-06-27T00:00:00Z' end-period: '2015-06-28T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3150724828 dns-udp-queries-received-ipv6: 228636821 dns-tcp-queries-received-ipv4: 9455454 dns-tcp-queries-received-ipv6: 270928 dns-udp-responses-sent-ipv4: 3117948730 dns-udp-responses-sent-ipv6: 232760925 dns-tcp-responses-sent-ipv4: 9274108 dns-tcp-responses-sent-ipv6: 274240