--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5828984691 dns-udp-queries-received-ipv6: 1116303428 dns-tcp-queries-received-ipv4: 522544792 dns-tcp-queries-received-ipv6: 142063990 dns-udp-responses-sent-ipv4: 4935485807 dns-udp-responses-sent-ipv6: 1029879412 dns-tcp-responses-sent-ipv4: 467720048 dns-tcp-responses-sent-ipv6: 129899325