--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5342125367 dns-udp-queries-received-ipv6: 1305520892 dns-tcp-queries-received-ipv4: 292031312 dns-tcp-queries-received-ipv6: 97598810 dns-udp-responses-sent-ipv4: 5171054731 dns-udp-responses-sent-ipv6: 1303114214 dns-tcp-responses-sent-ipv4: 283049424 dns-tcp-responses-sent-ipv6: 97533969