--- service: a.root-servers.net start-period: '2015-06-17T00:00:00Z' end-period: '2015-06-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2891679238 dns-udp-queries-received-ipv6: 230500556 dns-tcp-queries-received-ipv4: 17178695 dns-tcp-queries-received-ipv6: 6443789 dns-udp-responses-sent-ipv4: 2919182213 dns-udp-responses-sent-ipv6: 233740644 dns-tcp-responses-sent-ipv4: 14548879 dns-tcp-responses-sent-ipv6: 5269680