--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-10T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5568713635 dns-udp-queries-received-ipv6: 1422425149 dns-tcp-queries-received-ipv4: 304899528 dns-tcp-queries-received-ipv6: 96733824 dns-udp-responses-sent-ipv4: 5402450556 dns-udp-responses-sent-ipv6: 1419724109 dns-tcp-responses-sent-ipv4: 293909185 dns-tcp-responses-sent-ipv6: 96732963