--- service: i.root-servers.net start-period: '2015-04-26T00:00:00Z' end-period: '2015-04-27T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3124048523 dns-udp-queries-received-ipv6: 241485732 dns-tcp-queries-received-ipv4: 10032325 dns-tcp-queries-received-ipv6: 267672 dns-udp-responses-sent-ipv4: 3076749513 dns-udp-responses-sent-ipv6: 241416486 dns-tcp-responses-sent-ipv4: 10104134 dns-tcp-responses-sent-ipv6: 273977