--- service: i.root-servers.net start-period: '2015-06-09T00:00:00Z' end-period: '2015-06-10T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3998214120 dns-udp-queries-received-ipv6: 259933901 dns-tcp-queries-received-ipv4: 12560599 dns-tcp-queries-received-ipv6: 285560 dns-udp-responses-sent-ipv4: 3935257336 dns-udp-responses-sent-ipv6: 264557958 dns-tcp-responses-sent-ipv4: 12587303 dns-tcp-responses-sent-ipv6: 289864