--- service: a.root-servers.net start-period: '2016-04-19T00:00:00Z' end-period: '2016-04-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5355050940 dns-udp-queries-received-ipv6: 349728617 dns-tcp-queries-received-ipv4: 68748077 dns-tcp-queries-received-ipv6: 3880567 dns-udp-responses-sent-ipv4: 5344521066 dns-udp-responses-sent-ipv6: 349380825 dns-tcp-responses-sent-ipv4: 57977250 dns-tcp-responses-sent-ipv6: 278305