--- service: i.root-servers.net start-period: '2015-04-02T00:00:00Z' end-period: '2015-04-03T00:00:06Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3506304677 dns-udp-queries-received-ipv6: 240553404 dns-tcp-queries-received-ipv4: 9068490 dns-tcp-queries-received-ipv6: 303441 dns-udp-responses-sent-ipv4: 3453832759 dns-udp-responses-sent-ipv6: 243677420 dns-tcp-responses-sent-ipv4: 9130005 dns-tcp-responses-sent-ipv6: 306696