--- service: i.root-servers.net start-period: '2015-06-10T00:00:00Z' end-period: '2015-06-11T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3805813419 dns-udp-queries-received-ipv6: 262918658 dns-tcp-queries-received-ipv4: 12787113 dns-tcp-queries-received-ipv6: 310896 dns-udp-responses-sent-ipv4: 3749625171 dns-udp-responses-sent-ipv6: 267673845 dns-tcp-responses-sent-ipv4: 12836785 dns-tcp-responses-sent-ipv6: 312299