--- service: i.root-servers.net start-period: '2014-07-06T00:00:00Z' end-period: '2014-07-07T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2670273289 dns-udp-queries-received-ipv6: 178032463 dns-tcp-queries-received-ipv4: 6132992 dns-tcp-queries-received-ipv6: 249209 dns-udp-responses-sent-ipv4: 2623465464 dns-udp-responses-sent-ipv6: 181020935 dns-tcp-responses-sent-ipv4: 6312170 dns-tcp-responses-sent-ipv6: 252177