--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-27T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5636122054 dns-udp-queries-received-ipv6: 1221963641 dns-tcp-queries-received-ipv4: 285616546 dns-tcp-queries-received-ipv6: 102064212 dns-udp-responses-sent-ipv4: 5536521872 dns-udp-responses-sent-ipv6: 1233396365 dns-tcp-responses-sent-ipv4: 276987592 dns-tcp-responses-sent-ipv6: 102487549