--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-30T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4901523772 dns-udp-queries-received-ipv6: 1304592310 dns-tcp-queries-received-ipv4: 507546523 dns-tcp-queries-received-ipv6: 156642928 dns-udp-responses-sent-ipv4: 4383570834 dns-udp-responses-sent-ipv6: 1148263703 dns-tcp-responses-sent-ipv4: 500564358 dns-tcp-responses-sent-ipv6: 139019829