--- service: i.root-servers.net start-period: '2015-11-16T00:00:00Z' end-period: '2015-11-17T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4818760054 dns-udp-queries-received-ipv6: 331784642 dns-tcp-queries-received-ipv4: 29136686 dns-tcp-queries-received-ipv6: 747273 dns-udp-responses-sent-ipv4: 4759612574 dns-udp-responses-sent-ipv6: 336893042 dns-tcp-responses-sent-ipv4: 29078381 dns-tcp-responses-sent-ipv6: 749737