--- service: i.root-servers.net start-period: '2015-03-28T00:00:00Z' end-period: '2015-03-29T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3271377096 dns-udp-queries-received-ipv6: 236190247 dns-tcp-queries-received-ipv4: 7495207 dns-tcp-queries-received-ipv6: 273195 dns-udp-responses-sent-ipv4: 3224151535 dns-udp-responses-sent-ipv6: 239136348 dns-tcp-responses-sent-ipv4: 7482747 dns-tcp-responses-sent-ipv6: 278242