--- service: a.root-servers.net start-period: '2015-05-11T00:00:00Z' end-period: '2015-05-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2640643316 dns-udp-queries-received-ipv6: 208910119 dns-tcp-queries-received-ipv4: 21224508 dns-tcp-queries-received-ipv6: 2011176 dns-udp-responses-sent-ipv4: 2581789534 dns-udp-responses-sent-ipv6: 213846326 dns-tcp-responses-sent-ipv4: 17016646 dns-tcp-responses-sent-ipv6: 998889