--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4799050247 dns-udp-queries-received-ipv6: 1279737555 dns-tcp-queries-received-ipv4: 270739782 dns-tcp-queries-received-ipv6: 91124012 dns-udp-responses-sent-ipv4: 4651115916 dns-udp-responses-sent-ipv6: 1277779781 dns-tcp-responses-sent-ipv4: 261807687 dns-tcp-responses-sent-ipv6: 90820472