--- service: a.root-servers.net start-period: '2014-02-28T00:00:00Z' end-period: '2014-02-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2255003737 dns-udp-queries-received-ipv6: 87645680 dns-tcp-queries-received-ipv4: 11057215 dns-tcp-queries-received-ipv6: 1145020 dns-udp-responses-sent-ipv4: 2228124321 dns-udp-responses-sent-ipv6: 87631259 dns-tcp-responses-sent-ipv4: 11114557 dns-tcp-responses-sent-ipv6: 127