--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4876934889 dns-udp-queries-received-ipv6: 1040116397 dns-tcp-queries-received-ipv4: 453523737 dns-tcp-queries-received-ipv6: 155381964 dns-udp-responses-sent-ipv4: 4050304492 dns-udp-responses-sent-ipv6: 918063126 dns-tcp-responses-sent-ipv4: 356424917 dns-tcp-responses-sent-ipv6: 143019914