--- service: a.root-servers.net start-period: '2015-04-13T00:00:00Z' end-period: '2015-04-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3040948234 dns-udp-queries-received-ipv6: 232704536 dns-tcp-queries-received-ipv4: 21835695 dns-tcp-queries-received-ipv6: 2586158 dns-udp-responses-sent-ipv4: 3026635610 dns-udp-responses-sent-ipv6: 231699316 dns-tcp-responses-sent-ipv4: 17485158 dns-tcp-responses-sent-ipv6: 2123983