--- service: a.root-servers.net start-period: '2016-05-23T00:00:00Z' end-period: '2016-05-23T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6896561507 dns-udp-queries-received-ipv6: 428959453 dns-tcp-queries-received-ipv4: 74517138 dns-tcp-queries-received-ipv6: 5326292 dns-udp-responses-sent-ipv4: 6896069489 dns-udp-responses-sent-ipv6: 428792843 dns-tcp-responses-sent-ipv4: 62831186 dns-tcp-responses-sent-ipv6: 319321