--- service: a.root-servers.net start-period: '2013-11-18T00:00:00Z' end-period: '2013-11-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1478699152 dns-udp-queries-received-ipv6: 89964679 dns-tcp-queries-received-ipv4: 7269567 dns-tcp-queries-received-ipv6: 1388140 dns-udp-responses-sent-ipv4: 1477097060 dns-udp-responses-sent-ipv6: 89975963 dns-tcp-responses-sent-ipv4: 7807464 dns-tcp-responses-sent-ipv6: 8872