--- service: a.root-servers.net start-period: '2016-07-28T00:00:00Z' end-period: '2016-07-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4142330166 dns-udp-queries-received-ipv6: 478834932 dns-tcp-queries-received-ipv4: 95167524 dns-tcp-queries-received-ipv6: 8325344 dns-udp-responses-sent-ipv4: 4141856579 dns-udp-responses-sent-ipv6: 478736521 dns-tcp-responses-sent-ipv4: 76510704 dns-tcp-responses-sent-ipv6: 1314393