--- service: a.root-servers.net start-period: '2015-08-13T00:00:00Z' end-period: '2015-08-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3786962307 dns-udp-queries-received-ipv6: 240192120 dns-tcp-queries-received-ipv4: 17221876 dns-tcp-queries-received-ipv6: 10051566 dns-udp-responses-sent-ipv4: 4022721325 dns-udp-responses-sent-ipv6: 246719504 dns-tcp-responses-sent-ipv4: 14236951 dns-tcp-responses-sent-ipv6: 8925466