--- service: a.root-servers.net start-period: '2015-06-02T00:00:00Z' end-period: '2015-06-02T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2780061573 dns-udp-queries-received-ipv6: 238257582 dns-tcp-queries-received-ipv4: 18986739 dns-tcp-queries-received-ipv6: 2884419 dns-udp-responses-sent-ipv4: 2807410834 dns-udp-responses-sent-ipv6: 240701397 dns-tcp-responses-sent-ipv4: 17182677 dns-tcp-responses-sent-ipv6: 1344375