--- version: rssac002v3 service: a.root-servers.net start-period: '2021-07-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7558774226 dns-udp-queries-received-ipv6: 1358741433 dns-tcp-queries-received-ipv4: 289819982 dns-tcp-queries-received-ipv6: 102108111 dns-udp-responses-sent-ipv4: 7397090308 dns-udp-responses-sent-ipv6: 1357158033 dns-tcp-responses-sent-ipv4: 282932929 dns-tcp-responses-sent-ipv6: 102434579