--- service: i.root-servers.net start-period: '2014-07-27T00:00:00Z' end-period: '2014-07-28T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2699020983 dns-udp-queries-received-ipv6: 251145070 dns-tcp-queries-received-ipv4: 5913666 dns-tcp-queries-received-ipv6: 245731 dns-udp-responses-sent-ipv4: 2644537346 dns-udp-responses-sent-ipv6: 250874814 dns-tcp-responses-sent-ipv4: 5865079 dns-tcp-responses-sent-ipv6: 249999