--- service: a.root-servers.net start-period: '2017-02-20T00:00:00Z' end-period: '2017-02-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4965409689 dns-udp-queries-received-ipv6: 503736765 dns-tcp-queries-received-ipv4: 189881598 dns-tcp-queries-received-ipv6: 9698835 dns-udp-responses-sent-ipv4: 4961500221 dns-udp-responses-sent-ipv6: 503679304 dns-tcp-responses-sent-ipv4: 190283330 dns-tcp-responses-sent-ipv6: 9816561