--- service: d.root-servers.net start-period: '2015-12-06T00:00:00Z' end-period: '2015-12-06T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3950442550 dns-udp-queries-received-ipv6: 387243960 dns-tcp-queries-received-ipv4: 17975328 dns-tcp-queries-received-ipv6: 608237 dns-udp-responses-sent-ipv4: 3931342564 dns-udp-responses-sent-ipv6: 386941113 dns-tcp-responses-sent-ipv4: 17589903 dns-tcp-responses-sent-ipv6: 607670