--- service: a.root-servers.net start-period: '2016-09-20T00:00:00Z' end-period: '2016-09-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4723882425 dns-udp-queries-received-ipv6: 506971477 dns-tcp-queries-received-ipv4: 119460866 dns-tcp-queries-received-ipv6: 6330567 dns-udp-responses-sent-ipv4: 4718988521 dns-udp-responses-sent-ipv6: 506925811 dns-tcp-responses-sent-ipv4: 117146093 dns-tcp-responses-sent-ipv6: 4782052