--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5347390668 dns-udp-queries-received-ipv6: 1394267137 dns-tcp-queries-received-ipv4: 285875248 dns-tcp-queries-received-ipv6: 79007016 dns-udp-responses-sent-ipv4: 5342299373 dns-udp-responses-sent-ipv6: 1413367639 dns-tcp-responses-sent-ipv4: 281867684 dns-tcp-responses-sent-ipv6: 78838870