--- service: i.root-servers.net start-period: '2015-07-28T00:00:00Z' end-period: '2015-07-29T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5272624958 dns-udp-queries-received-ipv6: 250966684 dns-tcp-queries-received-ipv4: 12261739 dns-tcp-queries-received-ipv6: 290823 dns-udp-responses-sent-ipv4: 5228741906 dns-udp-responses-sent-ipv6: 255428413 dns-tcp-responses-sent-ipv4: 12258834 dns-tcp-responses-sent-ipv6: 293036