--- version: rssac002v3 service: i.root-servers.net start-period: '2021-08-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3949501869 dns-udp-queries-received-ipv6: 737571376 dns-tcp-queries-received-ipv4: 407303976 dns-tcp-queries-received-ipv6: 72706481 dns-udp-responses-sent-ipv4: 3501823385 dns-udp-responses-sent-ipv6: 724543164 dns-tcp-responses-sent-ipv4: 397295943 dns-tcp-responses-sent-ipv6: 73308698