--- version: rssac002v3 service: a.root-servers.net start-period: '2019-04-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5909045769 dns-udp-queries-received-ipv6: 787681271 dns-tcp-queries-received-ipv4: 202333202 dns-tcp-queries-received-ipv6: 29399999 dns-udp-responses-sent-ipv4: 5786003073 dns-udp-responses-sent-ipv6: 787133657 dns-tcp-responses-sent-ipv4: 199668348 dns-tcp-responses-sent-ipv6: 30012580