--- service: i.root-servers.net start-period: '2013-07-04T00:00:00Z' end-period: '2013-07-05T00:00:33Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2072530223 dns-udp-queries-received-ipv6: 140081444 dns-tcp-queries-received-ipv4: 3057281 dns-tcp-queries-received-ipv6: 153994 dns-udp-responses-sent-ipv4: 2082226264 dns-udp-responses-sent-ipv6: 146987328 dns-tcp-responses-sent-ipv4: 3286613 dns-tcp-responses-sent-ipv6: 156393