--- service: a.root-servers.net start-period: '2015-09-22T00:00:00Z' end-period: '2015-09-22T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3013014724 dns-udp-queries-received-ipv6: 295142460 dns-tcp-queries-received-ipv4: 24573309 dns-tcp-queries-received-ipv6: 11111220 dns-udp-responses-sent-ipv4: 3036823015 dns-udp-responses-sent-ipv6: 297686812 dns-tcp-responses-sent-ipv4: 21186735 dns-tcp-responses-sent-ipv6: 9407027