--- version: rssac002v4 service: a.root-servers.net start-period: '2021-10-28T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5389696562 dns-udp-queries-received-ipv6: 1310628077 dns-tcp-queries-received-ipv4: 295457903 dns-tcp-queries-received-ipv6: 96762641 dns-udp-responses-sent-ipv4: 5239492832 dns-udp-responses-sent-ipv6: 1308819463 dns-tcp-responses-sent-ipv4: 291796492 dns-tcp-responses-sent-ipv6: 96604879