--- service: a.root-servers.net start-period: '2015-09-16T00:00:00Z' end-period: '2015-09-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5040029161 dns-udp-queries-received-ipv6: 315878564 dns-tcp-queries-received-ipv4: 23634469 dns-tcp-queries-received-ipv6: 11221173 dns-udp-responses-sent-ipv4: 5068936678 dns-udp-responses-sent-ipv6: 319133220 dns-tcp-responses-sent-ipv4: 20360252 dns-tcp-responses-sent-ipv6: 9555794