--- service: i.root-servers.net start-period: '2015-10-18T00:00:00Z' end-period: '2015-10-19T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3790394073 dns-udp-queries-received-ipv6: 298589983 dns-tcp-queries-received-ipv4: 31269528 dns-tcp-queries-received-ipv6: 461317 dns-udp-responses-sent-ipv4: 3733600730 dns-udp-responses-sent-ipv6: 298558652 dns-tcp-responses-sent-ipv4: 31267461 dns-tcp-responses-sent-ipv6: 463843