--- service: i.root-servers.net start-period: '2016-03-12T00:00:00Z' end-period: '2016-03-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4759038392 dns-udp-queries-received-ipv6: 409275701 dns-tcp-queries-received-ipv4: 25719507 dns-tcp-queries-received-ipv6: 1175486 dns-udp-responses-sent-ipv4: 4684183963 dns-udp-responses-sent-ipv6: 413289828 dns-tcp-responses-sent-ipv4: 25385952 dns-tcp-responses-sent-ipv6: 1177797