--- service: a.root-servers.net start-period: '2015-09-12T00:00:00Z' end-period: '2015-09-12T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4594996947 dns-udp-queries-received-ipv6: 265971411 dns-tcp-queries-received-ipv4: 19317657 dns-tcp-queries-received-ipv6: 9734915 dns-udp-responses-sent-ipv4: 4558922356 dns-udp-responses-sent-ipv6: 266620260 dns-tcp-responses-sent-ipv4: 16519244 dns-tcp-responses-sent-ipv6: 8067540