--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5377982384 dns-udp-queries-received-ipv6: 1219030822 dns-tcp-queries-received-ipv4: 270252880 dns-tcp-queries-received-ipv6: 91035687 dns-udp-responses-sent-ipv4: 5228584036 dns-udp-responses-sent-ipv6: 1217573464 dns-tcp-responses-sent-ipv4: 261209904 dns-tcp-responses-sent-ipv6: 91715626