--- service: a.root-servers.net start-period: '2015-09-24T00:00:00Z' end-period: '2015-09-24T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3335757426 dns-udp-queries-received-ipv6: 305071460 dns-tcp-queries-received-ipv4: 22427249 dns-tcp-queries-received-ipv6: 11034586 dns-udp-responses-sent-ipv4: 3347891986 dns-udp-responses-sent-ipv6: 306095322 dns-tcp-responses-sent-ipv4: 19339272 dns-tcp-responses-sent-ipv6: 9378320