--- service: a.root-servers.net start-period: '2015-09-04T00:00:00Z' end-period: '2015-09-04T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4657159611 dns-udp-queries-received-ipv6: 278053662 dns-tcp-queries-received-ipv4: 18287113 dns-tcp-queries-received-ipv6: 9935890 dns-udp-responses-sent-ipv4: 4683490289 dns-udp-responses-sent-ipv6: 280616662 dns-tcp-responses-sent-ipv4: 15766228 dns-tcp-responses-sent-ipv6: 8267419