--- version: rssac002v3 service: i.root-servers.net start-period: '2021-06-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4628423387 dns-udp-queries-received-ipv6: 840584566 dns-tcp-queries-received-ipv4: 450914881 dns-tcp-queries-received-ipv6: 108350543 dns-udp-responses-sent-ipv4: 4083109090 dns-udp-responses-sent-ipv6: 826395488 dns-tcp-responses-sent-ipv4: 399422587 dns-tcp-responses-sent-ipv6: 104099775