--- service: i.root-servers.net start-period: '2016-04-10T00:00:00Z' end-period: '2016-04-11T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4649997894 dns-udp-queries-received-ipv6: 399116138 dns-tcp-queries-received-ipv4: 32714535 dns-tcp-queries-received-ipv6: 836114 dns-udp-responses-sent-ipv4: 4570181108 dns-udp-responses-sent-ipv6: 398700645 dns-tcp-responses-sent-ipv4: 31530214 dns-tcp-responses-sent-ipv6: 841043