--- service: a.root-servers.net start-period: '2015-02-07T00:00:00Z' end-period: '2015-02-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2740020794 dns-udp-queries-received-ipv6: 206366187 dns-tcp-queries-received-ipv4: 15489798 dns-tcp-queries-received-ipv6: 1352890 dns-udp-responses-sent-ipv4: 2739352720 dns-udp-responses-sent-ipv6: 206316733 dns-tcp-responses-sent-ipv4: 13450056 dns-tcp-responses-sent-ipv6: 566229