--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3963237114 dns-udp-queries-received-ipv6: 831556911 dns-tcp-queries-received-ipv4: 404739486 dns-tcp-queries-received-ipv6: 113604788 dns-udp-responses-sent-ipv4: 3458138306 dns-udp-responses-sent-ipv6: 781968275 dns-tcp-responses-sent-ipv4: 374661560 dns-tcp-responses-sent-ipv6: 109820793