--- service: a.root-servers.net start-period: '2015-04-27T00:00:00Z' end-period: '2015-04-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3082071067 dns-udp-queries-received-ipv6: 242683265 dns-tcp-queries-received-ipv4: 20093675 dns-tcp-queries-received-ipv6: 2438056 dns-udp-responses-sent-ipv4: 3056492908 dns-udp-responses-sent-ipv6: 241453570 dns-tcp-responses-sent-ipv4: 16802108 dns-tcp-responses-sent-ipv6: 1441607