--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5008957443 dns-udp-queries-received-ipv6: 1043086169 dns-tcp-queries-received-ipv4: 255899083 dns-tcp-queries-received-ipv6: 85923031 dns-udp-responses-sent-ipv4: 4873162360 dns-udp-responses-sent-ipv6: 1041819385 dns-tcp-responses-sent-ipv4: 248297090 dns-tcp-responses-sent-ipv6: 86303615