--- service: i.root-servers.net start-period: '2013-10-13T00:00:00Z' end-period: '2013-10-14T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1967911179 dns-udp-queries-received-ipv6: 114311754 dns-tcp-queries-received-ipv4: 4033915 dns-tcp-queries-received-ipv6: 140229 dns-udp-responses-sent-ipv4: 2044213041 dns-udp-responses-sent-ipv6: 121482638 dns-tcp-responses-sent-ipv4: 4064799 dns-tcp-responses-sent-ipv6: 152276