--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4570398888 dns-udp-queries-received-ipv6: 1078167315 dns-tcp-queries-received-ipv4: 500347684 dns-tcp-queries-received-ipv6: 147710924 dns-udp-responses-sent-ipv4: 4124219709 dns-udp-responses-sent-ipv6: 946583257 dns-tcp-responses-sent-ipv4: 474025024 dns-tcp-responses-sent-ipv6: 131765731