--- service: a.root-servers.net start-period: '2015-12-10T00:00:00Z' end-period: '2015-12-10T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4127834750 dns-udp-queries-received-ipv6: 310669757 dns-tcp-queries-received-ipv4: 45130279 dns-tcp-queries-received-ipv6: 2402653 dns-udp-responses-sent-ipv4: 4117765996 dns-udp-responses-sent-ipv6: 310072772 dns-tcp-responses-sent-ipv4: 37785147 dns-tcp-responses-sent-ipv6: 271511