--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-27T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5388717339 dns-udp-queries-received-ipv6: 960855664 dns-tcp-queries-received-ipv4: 499375271 dns-tcp-queries-received-ipv6: 127758916 dns-udp-responses-sent-ipv4: 4670802237 dns-udp-responses-sent-ipv6: 911355350 dns-tcp-responses-sent-ipv4: 403283460 dns-tcp-responses-sent-ipv6: 114183135