--- service: i.root-servers.net start-period: '2016-02-10T00:00:00Z' end-period: '2016-02-11T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4864730292 dns-udp-queries-received-ipv6: 400510317 dns-tcp-queries-received-ipv4: 18697054 dns-tcp-queries-received-ipv6: 904776 dns-udp-responses-sent-ipv4: 4838509762 dns-udp-responses-sent-ipv6: 402302884 dns-tcp-responses-sent-ipv4: 18729137 dns-tcp-responses-sent-ipv6: 908069