--- service: a.root-servers.net start-period: '2016-09-18T00:00:00Z' end-period: '2016-09-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4318479643 dns-udp-queries-received-ipv6: 441928243 dns-tcp-queries-received-ipv4: 113243273 dns-tcp-queries-received-ipv6: 5675860 dns-udp-responses-sent-ipv4: 4313594744 dns-udp-responses-sent-ipv6: 441879089 dns-tcp-responses-sent-ipv4: 107359016 dns-tcp-responses-sent-ipv6: 4279613