--- service: a.root-servers.net start-period: '2015-02-15T00:00:00Z' end-period: '2015-02-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2724558364 dns-udp-queries-received-ipv6: 200835880 dns-tcp-queries-received-ipv4: 14368538 dns-tcp-queries-received-ipv6: 2004469 dns-udp-responses-sent-ipv4: 2722161424 dns-udp-responses-sent-ipv6: 200670576 dns-tcp-responses-sent-ipv4: 12348001 dns-tcp-responses-sent-ipv6: 1258541