--- service: a.root-servers.net start-period: '2015-06-08T00:00:00Z' end-period: '2015-06-08T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2823513742 dns-udp-queries-received-ipv6: 219577200 dns-tcp-queries-received-ipv4: 18428540 dns-tcp-queries-received-ipv6: 5198121 dns-udp-responses-sent-ipv4: 2856867493 dns-udp-responses-sent-ipv6: 222119450 dns-tcp-responses-sent-ipv4: 15752788 dns-tcp-responses-sent-ipv6: 3012497