--- service: a.root-servers.net start-period: '2015-05-29T00:00:00Z' end-period: '2015-05-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2744567142 dns-udp-queries-received-ipv6: 185847727 dns-tcp-queries-received-ipv4: 18579634 dns-tcp-queries-received-ipv6: 2174958 dns-udp-responses-sent-ipv4: 2773294488 dns-udp-responses-sent-ipv6: 189051880 dns-tcp-responses-sent-ipv4: 16785398 dns-tcp-responses-sent-ipv6: 1222910