--- version: rssac002v3 service: a.root-servers.net start-period: '2021-06-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5418408184 dns-udp-queries-received-ipv6: 1408029478 dns-tcp-queries-received-ipv4: 287111051 dns-tcp-queries-received-ipv6: 94968776 dns-udp-responses-sent-ipv4: 5247582861 dns-udp-responses-sent-ipv6: 1405660562 dns-tcp-responses-sent-ipv4: 277426976 dns-tcp-responses-sent-ipv6: 94668586