--- service: a.root-servers.net start-period: '2015-09-27T00:00:00Z' end-period: '2015-09-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2871775694 dns-udp-queries-received-ipv6: 256617687 dns-tcp-queries-received-ipv4: 19005264 dns-tcp-queries-received-ipv6: 10807039 dns-udp-responses-sent-ipv4: 2870988930 dns-udp-responses-sent-ipv6: 254642615 dns-tcp-responses-sent-ipv4: 16167824 dns-tcp-responses-sent-ipv6: 9357759