--- service: i.root-servers.net start-period: '2015-04-13T00:00:00Z' end-period: '2015-04-14T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3638616575 dns-udp-queries-received-ipv6: 252183900 dns-tcp-queries-received-ipv4: 9249993 dns-tcp-queries-received-ipv6: 293280 dns-udp-responses-sent-ipv4: 3584137340 dns-udp-responses-sent-ipv6: 252087410 dns-tcp-responses-sent-ipv4: 9208382 dns-tcp-responses-sent-ipv6: 299853