--- service: a.root-servers.net start-period: '2015-01-28T00:00:00Z' end-period: '2015-01-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2902033281 dns-udp-queries-received-ipv6: 238087914 dns-tcp-queries-received-ipv4: 16099593 dns-tcp-queries-received-ipv6: 2182466 dns-udp-responses-sent-ipv4: 2901904200 dns-udp-responses-sent-ipv6: 237855773 dns-tcp-responses-sent-ipv4: 14523582 dns-tcp-responses-sent-ipv6: 1354018