--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5540965013 dns-udp-queries-received-ipv6: 1195896835 dns-tcp-queries-received-ipv4: 635601056 dns-tcp-queries-received-ipv6: 160746969 dns-udp-responses-sent-ipv4: 4798989640 dns-udp-responses-sent-ipv6: 1034207130 dns-tcp-responses-sent-ipv4: 604561444 dns-tcp-responses-sent-ipv6: 145556238