--- service: i.root-servers.net start-period: '2015-09-10T00:00:00Z' end-period: '2015-09-11T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4181222023 dns-udp-queries-received-ipv6: 283818767 dns-tcp-queries-received-ipv4: 25821959 dns-tcp-queries-received-ipv6: 454652 dns-udp-responses-sent-ipv4: 5739374465 dns-udp-responses-sent-ipv6: 283756752 dns-tcp-responses-sent-ipv4: 25876582 dns-tcp-responses-sent-ipv6: 462275