--- service: i.root-servers.net start-period: '2015-05-10T00:00:00Z' end-period: '2015-05-11T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3229996641 dns-udp-queries-received-ipv6: 235829775 dns-tcp-queries-received-ipv4: 10888943 dns-tcp-queries-received-ipv6: 253873 dns-udp-responses-sent-ipv4: 3183366722 dns-udp-responses-sent-ipv6: 238617500 dns-tcp-responses-sent-ipv4: 10911259 dns-tcp-responses-sent-ipv6: 261034