--- service: a.root-servers.net start-period: '2014-01-19T00:00:00Z' end-period: '2014-01-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1202406979 dns-udp-queries-received-ipv6: 44700722 dns-tcp-queries-received-ipv4: 6499554 dns-tcp-queries-received-ipv6: 1075111 dns-udp-responses-sent-ipv4: 1200958139 dns-udp-responses-sent-ipv6: 44702700 dns-tcp-responses-sent-ipv4: 6487951 dns-tcp-responses-sent-ipv6: 488