--- service: a.root-servers.net start-period: '2013-12-07T00:00:00Z' end-period: '2013-12-07T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1408038530 dns-udp-queries-received-ipv6: 65719948 dns-tcp-queries-received-ipv4: 7424973 dns-tcp-queries-received-ipv6: 1296616 dns-udp-responses-sent-ipv4: 1406100553 dns-udp-responses-sent-ipv6: 65731652 dns-tcp-responses-sent-ipv4: 7878199 dns-tcp-responses-sent-ipv6: 156