--- service: a.root-servers.net start-period: '2016-02-18T00:00:00Z' end-period: '2016-02-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5419843681 dns-udp-queries-received-ipv6: 351954499 dns-tcp-queries-received-ipv4: 79891028 dns-tcp-queries-received-ipv6: 3303012 dns-udp-responses-sent-ipv4: 5404073449 dns-udp-responses-sent-ipv6: 351551759 dns-tcp-responses-sent-ipv4: 68908484 dns-tcp-responses-sent-ipv6: 317998