--- service: i.root-servers.net start-period: '2013-10-07T00:00:00Z' end-period: '2013-10-08T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2464076723 dns-udp-queries-received-ipv6: 128805592 dns-tcp-queries-received-ipv4: 4173410 dns-tcp-queries-received-ipv6: 138462 dns-udp-responses-sent-ipv4: 2530501256 dns-udp-responses-sent-ipv6: 136979193 dns-tcp-responses-sent-ipv4: 4220028 dns-tcp-responses-sent-ipv6: 161513