--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5498875176 dns-udp-queries-received-ipv6: 1428673386 dns-tcp-queries-received-ipv4: 294226943 dns-tcp-queries-received-ipv6: 98847455 dns-udp-responses-sent-ipv4: 5334244031 dns-udp-responses-sent-ipv6: 1426373866 dns-tcp-responses-sent-ipv4: 278090779 dns-tcp-responses-sent-ipv6: 98614414