--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-14T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6379338997 dns-udp-queries-received-ipv6: 756904247 dns-tcp-queries-received-ipv4: 192834520 dns-tcp-queries-received-ipv6: 37152306 dns-udp-responses-sent-ipv4: 6255449039 dns-udp-responses-sent-ipv6: 756426456 dns-tcp-responses-sent-ipv4: 189212722 dns-tcp-responses-sent-ipv6: 34721802