--- service: i.root-servers.net start-period: '2015-07-26T00:00:00Z' end-period: '2015-07-27T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4719927159 dns-udp-queries-received-ipv6: 218283083 dns-tcp-queries-received-ipv4: 12100214 dns-tcp-queries-received-ipv6: 264546 dns-udp-responses-sent-ipv4: 4679335861 dns-udp-responses-sent-ipv6: 222633533 dns-tcp-responses-sent-ipv4: 12112537 dns-tcp-responses-sent-ipv6: 270111