--- service: a.root-servers.net start-period: '2015-02-16T00:00:00Z' end-period: '2015-02-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2795902588 dns-udp-queries-received-ipv6: 221684505 dns-tcp-queries-received-ipv4: 15412893 dns-tcp-queries-received-ipv6: 2056488 dns-udp-responses-sent-ipv4: 2784511564 dns-udp-responses-sent-ipv6: 221262556 dns-tcp-responses-sent-ipv4: 13044620 dns-tcp-responses-sent-ipv6: 1247161