--- service: i.root-servers.net start-period: '2013-12-22T00:00:00Z' end-period: '2013-12-23T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2000561375 dns-udp-queries-received-ipv6: 131876696 dns-tcp-queries-received-ipv4: 4378973 dns-tcp-queries-received-ipv6: 238471 dns-udp-responses-sent-ipv4: 1945825759 dns-udp-responses-sent-ipv6: 132007097 dns-tcp-responses-sent-ipv4: 4396664 dns-tcp-responses-sent-ipv6: 242536