--- service: a.root-servers.net start-period: '2014-05-19T00:00:00Z' end-period: '2014-05-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2444101461 dns-udp-queries-received-ipv6: 111123795 dns-tcp-queries-received-ipv4: 12010810 dns-tcp-queries-received-ipv6: 791577 dns-udp-responses-sent-ipv4: 2443433470 dns-udp-responses-sent-ipv6: 111107041 dns-tcp-responses-sent-ipv4: 12037664 dns-tcp-responses-sent-ipv6: 157