--- service: a.root-servers.net start-period: '2015-08-16T00:00:00Z' end-period: '2015-08-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3456445709 dns-udp-queries-received-ipv6: 171560978 dns-tcp-queries-received-ipv4: 16977642 dns-tcp-queries-received-ipv6: 8347819 dns-udp-responses-sent-ipv4: 3714441612 dns-udp-responses-sent-ipv6: 177333215 dns-tcp-responses-sent-ipv4: 13965744 dns-tcp-responses-sent-ipv6: 7113203