--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-08T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5499962528 dns-udp-queries-received-ipv6: 1425726108 dns-tcp-queries-received-ipv4: 288215630 dns-tcp-queries-received-ipv6: 94028144 dns-udp-responses-sent-ipv4: 5337692453 dns-udp-responses-sent-ipv6: 1423743943 dns-tcp-responses-sent-ipv4: 274855815 dns-tcp-responses-sent-ipv6: 93945389