--- service: a.root-servers.net start-period: '2015-02-18T00:00:00Z' end-period: '2015-02-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2944401209 dns-udp-queries-received-ipv6: 210794878 dns-tcp-queries-received-ipv4: 15266337 dns-tcp-queries-received-ipv6: 1993347 dns-udp-responses-sent-ipv4: 2937301332 dns-udp-responses-sent-ipv6: 210539769 dns-tcp-responses-sent-ipv4: 12966792 dns-tcp-responses-sent-ipv6: 1240940