--- service: a.root-servers.net start-period: '2015-09-08T00:00:00Z' end-period: '2015-09-08T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4877442643 dns-udp-queries-received-ipv6: 282582735 dns-tcp-queries-received-ipv4: 19857132 dns-tcp-queries-received-ipv6: 9904621 dns-udp-responses-sent-ipv4: 4905094351 dns-udp-responses-sent-ipv6: 285263155 dns-tcp-responses-sent-ipv4: 17161813 dns-tcp-responses-sent-ipv6: 8190994