--- service: a.root-servers.net start-period: '2015-12-08T00:00:00Z' end-period: '2015-12-08T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4449095803 dns-udp-queries-received-ipv6: 328913447 dns-tcp-queries-received-ipv4: 43044912 dns-tcp-queries-received-ipv6: 2426291 dns-udp-responses-sent-ipv4: 4451258318 dns-udp-responses-sent-ipv6: 328645849 dns-tcp-responses-sent-ipv4: 35957025 dns-tcp-responses-sent-ipv6: 274190