--- version: rssac002v3 service: i.root-servers.net start-period: '2021-06-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5379354952 dns-udp-queries-received-ipv6: 969145362 dns-tcp-queries-received-ipv4: 493143122 dns-tcp-queries-received-ipv6: 114413794 dns-udp-responses-sent-ipv4: 4661529453 dns-udp-responses-sent-ipv6: 939242393 dns-tcp-responses-sent-ipv4: 409783880 dns-tcp-responses-sent-ipv6: 106366065