--- service: a.root-servers.net start-period: '2014-12-27T00:00:00Z' end-period: '2014-12-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2196768877 dns-udp-queries-received-ipv6: 176419550 dns-tcp-queries-received-ipv4: 13258678 dns-tcp-queries-received-ipv6: 2300644 dns-udp-responses-sent-ipv4: 2196076680 dns-udp-responses-sent-ipv6: 176407332 dns-tcp-responses-sent-ipv4: 12294285 dns-tcp-responses-sent-ipv6: 1596170