--- version: rssac002v3 service: i.root-servers.net start-period: '2021-06-30T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5492704815 dns-udp-queries-received-ipv6: 1177312166 dns-tcp-queries-received-ipv4: 529775485 dns-tcp-queries-received-ipv6: 145738836 dns-udp-responses-sent-ipv4: 4716740057 dns-udp-responses-sent-ipv6: 1048172962 dns-tcp-responses-sent-ipv4: 477041666 dns-tcp-responses-sent-ipv6: 115060000