--- service: i.root-servers.net start-period: '2013-12-03T09:12:02Z' end-period: '2013-12-04T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1181729898 dns-udp-queries-received-ipv6: 72988550 dns-tcp-queries-received-ipv4: 2092387 dns-tcp-queries-received-ipv6: 112092 dns-udp-responses-sent-ipv4: 1200972838 dns-udp-responses-sent-ipv6: 78363810 dns-tcp-responses-sent-ipv4: 2098873 dns-tcp-responses-sent-ipv6: 117860