--- service: a.root-servers.net start-period: '2013-12-30T00:00:00Z' end-period: '2013-12-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1232090086 dns-udp-queries-received-ipv6: 49373377 dns-tcp-queries-received-ipv4: 6880711 dns-tcp-queries-received-ipv6: 712351 dns-udp-responses-sent-ipv4: 1231020809 dns-udp-responses-sent-ipv6: 49380453 dns-tcp-responses-sent-ipv4: 7112730 dns-tcp-responses-sent-ipv6: 56