--- service: i.root-servers.net start-period: '2015-09-27T00:00:00Z' end-period: '2015-09-28T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3431005780 dns-udp-queries-received-ipv6: 293477092 dns-tcp-queries-received-ipv4: 25671733 dns-tcp-queries-received-ipv6: 431245 dns-udp-responses-sent-ipv4: 3383658492 dns-udp-responses-sent-ipv6: 293213218 dns-tcp-responses-sent-ipv4: 25625704 dns-tcp-responses-sent-ipv6: 434242