--- service: a.root-servers.net start-period: '2015-07-09T00:00:00Z' end-period: '2015-07-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3062252278 dns-udp-queries-received-ipv6: 277858942 dns-tcp-queries-received-ipv4: 19176810 dns-tcp-queries-received-ipv6: 10334169 dns-udp-responses-sent-ipv4: 3089804884 dns-udp-responses-sent-ipv6: 280087602 dns-tcp-responses-sent-ipv4: 16340275 dns-tcp-responses-sent-ipv6: 8700932