--- service: i.root-servers.net start-period: '2015-06-04T00:00:00Z' end-period: '2015-06-05T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3700036531 dns-udp-queries-received-ipv6: 243905216 dns-tcp-queries-received-ipv4: 12673181 dns-tcp-queries-received-ipv6: 293324 dns-udp-responses-sent-ipv4: 3638622955 dns-udp-responses-sent-ipv6: 247338269 dns-tcp-responses-sent-ipv4: 12664485 dns-tcp-responses-sent-ipv6: 298365