--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6558033613 dns-udp-queries-received-ipv6: 1740908694 dns-tcp-queries-received-ipv4: 635869113 dns-tcp-queries-received-ipv6: 84008971 dns-udp-responses-sent-ipv4: 5818191465 dns-udp-responses-sent-ipv6: 1630594307 dns-tcp-responses-sent-ipv4: 636568437 dns-tcp-responses-sent-ipv6: 71075817