--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5263955885 dns-udp-queries-received-ipv6: 996512213 dns-tcp-queries-received-ipv4: 505085032 dns-tcp-queries-received-ipv6: 128841956 dns-udp-responses-sent-ipv4: 4097082500 dns-udp-responses-sent-ipv6: 892502906 dns-tcp-responses-sent-ipv4: 373106108 dns-tcp-responses-sent-ipv6: 116345632