--- service: a.root-servers.net start-period: '2016-04-16T00:00:00Z' end-period: '2016-04-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4913229721 dns-udp-queries-received-ipv6: 327522803 dns-tcp-queries-received-ipv4: 71837443 dns-tcp-queries-received-ipv6: 3133117 dns-udp-responses-sent-ipv4: 4912640459 dns-udp-responses-sent-ipv6: 327246210 dns-tcp-responses-sent-ipv4: 60780564 dns-tcp-responses-sent-ipv6: 280746