--- service: a.root-servers.net start-period: '2014-05-31T00:00:00Z' end-period: '2014-05-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1595518216 dns-udp-queries-received-ipv6: 106392183 dns-tcp-queries-received-ipv4: 8505890 dns-tcp-queries-received-ipv6: 1097515 dns-udp-responses-sent-ipv4: 1595294878 dns-udp-responses-sent-ipv6: 106337667 dns-tcp-responses-sent-ipv4: 8536695 dns-tcp-responses-sent-ipv6: 102452