--- service: i.root-servers.net start-period: '2013-09-03T00:00:00Z' end-period: '2013-09-04T00:59:48Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2211641451 dns-udp-queries-received-ipv6: 145406467 dns-tcp-queries-received-ipv4: 5422577 dns-tcp-queries-received-ipv6: 172479 dns-udp-responses-sent-ipv4: 2169161308 dns-udp-responses-sent-ipv6: 145376783 dns-tcp-responses-sent-ipv4: 5391537 dns-tcp-responses-sent-ipv6: 174263