--- service: i.root-servers.net start-period: '2015-06-16T00:00:00Z' end-period: '2015-06-17T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3851043348 dns-udp-queries-received-ipv6: 242327092 dns-tcp-queries-received-ipv4: 13221426 dns-tcp-queries-received-ipv6: 328098 dns-udp-responses-sent-ipv4: 3793649370 dns-udp-responses-sent-ipv6: 247249386 dns-tcp-responses-sent-ipv4: 13244406 dns-tcp-responses-sent-ipv6: 328220