--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5202689851 dns-udp-queries-received-ipv6: 1090954315 dns-tcp-queries-received-ipv4: 570476979 dns-tcp-queries-received-ipv6: 147200109 dns-udp-responses-sent-ipv4: 4638009929 dns-udp-responses-sent-ipv6: 946599709 dns-tcp-responses-sent-ipv4: 548551513 dns-tcp-responses-sent-ipv6: 132368109