--- version: rssac002v3 service: a.root-servers.net start-period: '2021-01-08T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6094183282 dns-udp-queries-received-ipv6: 1177786147 dns-tcp-queries-received-ipv4: 293988372 dns-tcp-queries-received-ipv6: 120092917 dns-udp-responses-sent-ipv4: 5920553172 dns-udp-responses-sent-ipv6: 1175358605 dns-tcp-responses-sent-ipv4: 281495001 dns-tcp-responses-sent-ipv6: 120456988