--- service: i.root-servers.net start-period: '2014-01-02T00:00:00Z' end-period: '2014-01-03T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2444581318 dns-udp-queries-received-ipv6: 142189818 dns-tcp-queries-received-ipv4: 5013730 dns-tcp-queries-received-ipv6: 258717 dns-udp-responses-sent-ipv4: 2392724439 dns-udp-responses-sent-ipv6: 142340240 dns-tcp-responses-sent-ipv4: 5075756 dns-tcp-responses-sent-ipv6: 261517