--- version: rssac002v4 service: a.root-servers.net start-period: '2021-10-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5336475906 dns-udp-queries-received-ipv6: 1302687744 dns-tcp-queries-received-ipv4: 302641214 dns-tcp-queries-received-ipv6: 74302949 dns-udp-responses-sent-ipv4: 5185118185 dns-udp-responses-sent-ipv6: 1300772878 dns-tcp-responses-sent-ipv4: 300167139 dns-tcp-responses-sent-ipv6: 74751218