--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5494144053 dns-udp-queries-received-ipv6: 1392297767 dns-tcp-queries-received-ipv4: 293024893 dns-tcp-queries-received-ipv6: 94320746 dns-udp-responses-sent-ipv4: 5334457844 dns-udp-responses-sent-ipv6: 1390238338 dns-tcp-responses-sent-ipv4: 282399395 dns-tcp-responses-sent-ipv6: 94665392