--- service: i.root-servers.net start-period: '2013-05-04T00:00:00Z' end-period: '2013-05-05T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1801228359 dns-udp-queries-received-ipv6: 107033501 dns-tcp-queries-received-ipv4: 3376880 dns-tcp-queries-received-ipv6: 137796 dns-udp-responses-sent-ipv4: 1811504398 dns-udp-responses-sent-ipv6: 114292530 dns-tcp-responses-sent-ipv4: 3152055 dns-tcp-responses-sent-ipv6: 139947