--- service: a.root-servers.net start-period: '2015-01-27T00:00:00Z' end-period: '2015-01-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3049773076 dns-udp-queries-received-ipv6: 223816599 dns-tcp-queries-received-ipv4: 15848137 dns-tcp-queries-received-ipv6: 2188916 dns-udp-responses-sent-ipv4: 3048844662 dns-udp-responses-sent-ipv6: 223681218 dns-tcp-responses-sent-ipv4: 14542049 dns-tcp-responses-sent-ipv6: 1370865