--- service: a.root-servers.net start-period: '2016-07-17T00:00:00Z' end-period: '2016-07-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3177551546 dns-udp-queries-received-ipv6: 448099423 dns-tcp-queries-received-ipv4: 35518854 dns-tcp-queries-received-ipv6: 8037908 dns-udp-responses-sent-ipv4: 3168877077 dns-udp-responses-sent-ipv6: 448163352 dns-tcp-responses-sent-ipv4: 30783770 dns-tcp-responses-sent-ipv6: 2588726