--- version: rssac002v3 service: i.root-servers.net start-period: '2021-07-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4917125894 dns-udp-queries-received-ipv6: 1025659214 dns-tcp-queries-received-ipv4: 553531744 dns-tcp-queries-received-ipv6: 125196027 dns-udp-responses-sent-ipv4: 4099841245 dns-udp-responses-sent-ipv6: 984319105 dns-tcp-responses-sent-ipv4: 459372190 dns-tcp-responses-sent-ipv6: 124515947