--- service: a.root-servers.net start-period: '2015-09-30T00:00:00Z' end-period: '2015-09-30T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3247076861 dns-udp-queries-received-ipv6: 266721868 dns-tcp-queries-received-ipv4: 19834044 dns-tcp-queries-received-ipv6: 8223886 dns-udp-responses-sent-ipv4: 3246912454 dns-udp-responses-sent-ipv6: 264950537 dns-tcp-responses-sent-ipv4: 16707217 dns-tcp-responses-sent-ipv6: 6483661