--- version: rssac002v3 service: i.root-servers.net start-period: '2021-06-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5177172046 dns-udp-queries-received-ipv6: 938681402 dns-tcp-queries-received-ipv4: 471901270 dns-tcp-queries-received-ipv6: 112105499 dns-udp-responses-sent-ipv4: 4510948673 dns-udp-responses-sent-ipv6: 934296318 dns-tcp-responses-sent-ipv4: 395749175 dns-tcp-responses-sent-ipv6: 105438259