--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6198301109 dns-udp-queries-received-ipv6: 845298492 dns-tcp-queries-received-ipv4: 182099492 dns-tcp-queries-received-ipv6: 35212442 dns-udp-responses-sent-ipv4: 6075529857 dns-udp-responses-sent-ipv6: 844557145 dns-tcp-responses-sent-ipv4: 178861293 dns-tcp-responses-sent-ipv6: 32608914