--- service: a.root-servers.net start-period: '2015-07-08T00:00:00Z' end-period: '2015-07-08T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3157730857 dns-udp-queries-received-ipv6: 286858683 dns-tcp-queries-received-ipv4: 19282642 dns-tcp-queries-received-ipv6: 9858948 dns-udp-responses-sent-ipv4: 3188481566 dns-udp-responses-sent-ipv6: 288888782 dns-tcp-responses-sent-ipv4: 16364440 dns-tcp-responses-sent-ipv6: 8081451