--- service: a.root-servers.net start-period: '2015-07-11T00:00:00Z' end-period: '2015-07-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4303249028 dns-udp-queries-received-ipv6: 244517882 dns-tcp-queries-received-ipv4: 17184628 dns-tcp-queries-received-ipv6: 10405662 dns-udp-responses-sent-ipv4: 4326794358 dns-udp-responses-sent-ipv6: 246516061 dns-tcp-responses-sent-ipv4: 14617442 dns-tcp-responses-sent-ipv6: 9043206