--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6453576671 dns-udp-queries-received-ipv6: 1661113239 dns-tcp-queries-received-ipv4: 619255869 dns-tcp-queries-received-ipv6: 82411018 dns-udp-responses-sent-ipv4: 5713688308 dns-udp-responses-sent-ipv6: 1576770312 dns-tcp-responses-sent-ipv4: 606884667 dns-tcp-responses-sent-ipv6: 81710448