--- service: i.root-servers.net start-period: '2014-02-19T00:00:00Z' end-period: '2014-02-20T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2974712838 dns-udp-queries-received-ipv6: 188467094 dns-tcp-queries-received-ipv4: 6079047 dns-tcp-queries-received-ipv6: 355676 dns-udp-responses-sent-ipv4: 2914868214 dns-udp-responses-sent-ipv6: 188601391 dns-tcp-responses-sent-ipv4: 6110547 dns-tcp-responses-sent-ipv6: 353841