--- service: a.root-servers.net start-period: '2015-08-15T00:00:00Z' end-period: '2015-08-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3323969410 dns-udp-queries-received-ipv6: 172161711 dns-tcp-queries-received-ipv4: 17557428 dns-tcp-queries-received-ipv6: 8527298 dns-udp-responses-sent-ipv4: 3578424888 dns-udp-responses-sent-ipv6: 177831591 dns-tcp-responses-sent-ipv4: 14488622 dns-tcp-responses-sent-ipv6: 7348914