--- service: a.root-servers.net start-period: '2016-04-01T00:00:00Z' end-period: '2016-04-01T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5769720998 dns-udp-queries-received-ipv6: 353411905 dns-tcp-queries-received-ipv4: 87159544 dns-tcp-queries-received-ipv6: 3177500 dns-udp-responses-sent-ipv4: 5740566808 dns-udp-responses-sent-ipv6: 354156297 dns-tcp-responses-sent-ipv4: 66729248 dns-tcp-responses-sent-ipv6: 270038