--- service: i.root-servers.net start-period: '2014-04-27T00:00:00Z' end-period: '2014-04-28T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2411487355 dns-udp-queries-received-ipv6: 170370987 dns-tcp-queries-received-ipv4: 5250112 dns-tcp-queries-received-ipv6: 251857 dns-udp-responses-sent-ipv4: 2360642892 dns-udp-responses-sent-ipv6: 172768465 dns-tcp-responses-sent-ipv4: 5266600 dns-tcp-responses-sent-ipv6: 251115