--- service: a.root-servers.net start-period: '2015-02-25T00:00:00Z' end-period: '2015-02-25T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2794865465 dns-udp-queries-received-ipv6: 227224943 dns-tcp-queries-received-ipv4: 18274806 dns-tcp-queries-received-ipv6: 2430875 dns-udp-responses-sent-ipv4: 2780626195 dns-udp-responses-sent-ipv6: 226635730 dns-tcp-responses-sent-ipv4: 15832388 dns-tcp-responses-sent-ipv6: 1340849