--- version: rssac002v3 service: a.root-servers.net start-period: '2021-05-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5215870978 dns-udp-queries-received-ipv6: 1007034899 dns-tcp-queries-received-ipv4: 355696358 dns-tcp-queries-received-ipv6: 96477652 dns-udp-responses-sent-ipv4: 5157690785 dns-udp-responses-sent-ipv6: 1025634722 dns-tcp-responses-sent-ipv4: 317243658 dns-tcp-responses-sent-ipv6: 96824509