--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-03T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5278895310 dns-udp-queries-received-ipv6: 1390329611 dns-tcp-queries-received-ipv4: 284602887 dns-tcp-queries-received-ipv6: 104532917 dns-udp-responses-sent-ipv4: 5595603514 dns-udp-responses-sent-ipv6: 1447278960 dns-tcp-responses-sent-ipv4: 280750551 dns-tcp-responses-sent-ipv6: 104448192