--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5670730408 dns-udp-queries-received-ipv6: 1111263803 dns-tcp-queries-received-ipv4: 293608669 dns-tcp-queries-received-ipv6: 97450278 dns-udp-responses-sent-ipv4: 5509074269 dns-udp-responses-sent-ipv6: 1109427997 dns-tcp-responses-sent-ipv4: 280942772 dns-tcp-responses-sent-ipv6: 97742496