--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4983321315 dns-udp-queries-received-ipv6: 1139482771 dns-tcp-queries-received-ipv4: 533839101 dns-tcp-queries-received-ipv6: 145574527 dns-udp-responses-sent-ipv4: 4380528359 dns-udp-responses-sent-ipv6: 1005855908 dns-tcp-responses-sent-ipv4: 476199079 dns-tcp-responses-sent-ipv6: 128392720