--- service: a.root-servers.net start-period: '2015-07-14T00:00:00Z' end-period: '2015-07-14T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4548897575 dns-udp-queries-received-ipv6: 270067458 dns-tcp-queries-received-ipv4: 19707946 dns-tcp-queries-received-ipv6: 10854401 dns-udp-responses-sent-ipv4: 4576102315 dns-udp-responses-sent-ipv6: 272320880 dns-tcp-responses-sent-ipv4: 16799847 dns-tcp-responses-sent-ipv6: 10217981