--- service: a.root-servers.net start-period: '2015-05-14T00:00:00Z' end-period: '2015-05-14T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5379606262 dns-udp-queries-received-ipv6: 304281776 dns-tcp-queries-received-ipv4: 60336207 dns-tcp-queries-received-ipv6: 3396800 dns-udp-responses-sent-ipv4: 5378310698 dns-udp-responses-sent-ipv6: 303740439 dns-tcp-responses-sent-ipv4: 52329300 dns-tcp-responses-sent-ipv6: 1508133