--- service: a.root-servers.net start-period: '2015-06-13T00:00:00Z' end-period: '2015-06-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2470577387 dns-udp-queries-received-ipv6: 197237179 dns-tcp-queries-received-ipv4: 15242058 dns-tcp-queries-received-ipv6: 7853306 dns-udp-responses-sent-ipv4: 2495854665 dns-udp-responses-sent-ipv6: 199647112 dns-tcp-responses-sent-ipv4: 13071548 dns-tcp-responses-sent-ipv6: 6833687