--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6550273109 dns-udp-queries-received-ipv6: 1484961866 dns-tcp-queries-received-ipv4: 623156734 dns-tcp-queries-received-ipv6: 76167192 dns-udp-responses-sent-ipv4: 5771741824 dns-udp-responses-sent-ipv6: 1378541046 dns-tcp-responses-sent-ipv4: 613151797 dns-tcp-responses-sent-ipv6: 58750870