--- service: a.root-servers.net start-period: '2015-02-09T00:00:00Z' end-period: '2015-02-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3071590288 dns-udp-queries-received-ipv6: 224373593 dns-tcp-queries-received-ipv4: 17821127 dns-tcp-queries-received-ipv6: 1788261 dns-udp-responses-sent-ipv4: 3071464672 dns-udp-responses-sent-ipv6: 224297126 dns-tcp-responses-sent-ipv4: 15433550 dns-tcp-responses-sent-ipv6: 1049415