--- service: a.root-servers.net start-period: '2015-09-14T00:00:00Z' end-period: '2015-09-14T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4677958871 dns-udp-queries-received-ipv6: 286124547 dns-tcp-queries-received-ipv4: 19633897 dns-tcp-queries-received-ipv6: 10208615 dns-udp-responses-sent-ipv4: 4554565327 dns-udp-responses-sent-ipv6: 284750504 dns-tcp-responses-sent-ipv4: 16636983 dns-tcp-responses-sent-ipv6: 8390285