--- version: rssac002v4 service: a.root-servers.net start-period: '2021-10-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5373234276 dns-udp-queries-received-ipv6: 1381856498 dns-tcp-queries-received-ipv4: 297790508 dns-tcp-queries-received-ipv6: 74005320 dns-udp-responses-sent-ipv4: 5227242390 dns-udp-responses-sent-ipv6: 1380037370 dns-tcp-responses-sent-ipv4: 294838452 dns-tcp-responses-sent-ipv6: 74653797