--- service: a.root-servers.net start-period: '2015-08-17T00:00:00Z' end-period: '2015-08-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3804069968 dns-udp-queries-received-ipv6: 192927042 dns-tcp-queries-received-ipv4: 16766815 dns-tcp-queries-received-ipv6: 8606370 dns-udp-responses-sent-ipv4: 4069347221 dns-udp-responses-sent-ipv6: 200053609 dns-tcp-responses-sent-ipv4: 13812950 dns-tcp-responses-sent-ipv6: 7096992