--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5228630572 dns-udp-queries-received-ipv6: 993260537 dns-tcp-queries-received-ipv4: 525457564 dns-tcp-queries-received-ipv6: 68062351 dns-udp-responses-sent-ipv4: 4478915845 dns-udp-responses-sent-ipv6: 931141372 dns-tcp-responses-sent-ipv4: 509198258 dns-tcp-responses-sent-ipv6: 52138666