--- service: i.root-servers.net start-period: '2015-09-17T00:00:00Z' end-period: '2015-09-17T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4798073275 dns-udp-queries-received-ipv6: 312294316 dns-tcp-queries-received-ipv4: 26026460 dns-tcp-queries-received-ipv6: 460305 dns-udp-responses-sent-ipv4: 5818735395 dns-udp-responses-sent-ipv6: 313614526 dns-tcp-responses-sent-ipv4: 25991324 dns-tcp-responses-sent-ipv6: 466389