--- version: rssac002v3 service: a.root-servers.net start-period: '2021-09-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5515722397 dns-udp-queries-received-ipv6: 1158649264 dns-tcp-queries-received-ipv4: 316822803 dns-tcp-queries-received-ipv6: 96108119 dns-udp-responses-sent-ipv4: 5527091185 dns-udp-responses-sent-ipv6: 1179644972 dns-tcp-responses-sent-ipv4: 306175173 dns-tcp-responses-sent-ipv6: 96188359