--- service: i.root-servers.net start-period: '2015-06-26T00:00:00Z' end-period: '2015-06-27T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3549538559 dns-udp-queries-received-ipv6: 253358607 dns-tcp-queries-received-ipv4: 9411221 dns-tcp-queries-received-ipv6: 303681 dns-udp-responses-sent-ipv4: 3511544129 dns-udp-responses-sent-ipv6: 257778597 dns-tcp-responses-sent-ipv4: 9071937 dns-tcp-responses-sent-ipv6: 305176