--- service: a.root-servers.net start-period: '2015-02-27T00:00:00Z' end-period: '2015-02-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2966088252 dns-udp-queries-received-ipv6: 221203308 dns-tcp-queries-received-ipv4: 16153472 dns-tcp-queries-received-ipv6: 2137738 dns-udp-responses-sent-ipv4: 2951892560 dns-udp-responses-sent-ipv6: 220510621 dns-tcp-responses-sent-ipv4: 13865887 dns-tcp-responses-sent-ipv6: 1177541