--- service: i.root-servers.net start-period: '2015-12-06T00:00:00Z' end-period: '2015-12-07T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4380705278 dns-udp-queries-received-ipv6: 326649269 dns-tcp-queries-received-ipv4: 18256106 dns-tcp-queries-received-ipv6: 845103 dns-udp-responses-sent-ipv4: 4332406657 dns-udp-responses-sent-ipv6: 329201681 dns-tcp-responses-sent-ipv4: 18287207 dns-tcp-responses-sent-ipv6: 849396