--- version: rssac002v3 service: a.root-servers.net start-period: '2021-01-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6048012074 dns-udp-queries-received-ipv6: 1126727875 dns-tcp-queries-received-ipv4: 287744634 dns-tcp-queries-received-ipv6: 115119673 dns-udp-responses-sent-ipv4: 5862745149 dns-udp-responses-sent-ipv6: 1125255927 dns-tcp-responses-sent-ipv4: 277771209 dns-tcp-responses-sent-ipv6: 115598081