--- service: a.root-servers.net start-period: '2015-02-13T00:00:00Z' end-period: '2015-02-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3387023844 dns-udp-queries-received-ipv6: 222543757 dns-tcp-queries-received-ipv4: 21306075 dns-tcp-queries-received-ipv6: 1909849 dns-udp-responses-sent-ipv4: 3384312148 dns-udp-responses-sent-ipv6: 222537277 dns-tcp-responses-sent-ipv4: 18705608 dns-tcp-responses-sent-ipv6: 1070398