--- service: i.root-servers.net start-period: '2013-09-10T06:20:14Z' end-period: '2013-09-11T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1774343516 dns-udp-queries-received-ipv6: 112833219 dns-tcp-queries-received-ipv4: 3000459 dns-tcp-queries-received-ipv6: 69623 dns-udp-responses-sent-ipv4: 1765799730 dns-udp-responses-sent-ipv6: 118112989 dns-tcp-responses-sent-ipv4: 3027189 dns-tcp-responses-sent-ipv6: 94665