--- service: d.root-servers.net start-period: '2015-12-11T00:00:00Z' end-period: '2015-12-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4257178858 dns-udp-queries-received-ipv6: 426227770 dns-tcp-queries-received-ipv4: 22872102 dns-tcp-queries-received-ipv6: 663662 dns-udp-responses-sent-ipv4: 4235309252 dns-udp-responses-sent-ipv6: 425880672 dns-tcp-responses-sent-ipv4: 22557156 dns-tcp-responses-sent-ipv6: 662855