--- version: rssac002v3 service: a.root-servers.net start-period: '2021-09-13T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5386004974 dns-udp-queries-received-ipv6: 1163441801 dns-tcp-queries-received-ipv4: 309107302 dns-tcp-queries-received-ipv6: 99405608 dns-udp-responses-sent-ipv4: 5401703549 dns-udp-responses-sent-ipv6: 1198105184 dns-tcp-responses-sent-ipv4: 296817593 dns-tcp-responses-sent-ipv6: 99256118