--- service: a.root-servers.net start-period: '2015-04-26T00:00:00Z' end-period: '2015-04-26T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2447422186 dns-udp-queries-received-ipv6: 218899959 dns-tcp-queries-received-ipv4: 18104887 dns-tcp-queries-received-ipv6: 2387780 dns-udp-responses-sent-ipv4: 2435736614 dns-udp-responses-sent-ipv6: 218327180 dns-tcp-responses-sent-ipv4: 15194203 dns-tcp-responses-sent-ipv6: 1918181