--- version: rssac002v3 service: a.root-servers.net start-period: '2021-04-24T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4783420650 dns-udp-queries-received-ipv6: 1041972902 dns-tcp-queries-received-ipv4: 256062700 dns-tcp-queries-received-ipv6: 87001858 dns-udp-responses-sent-ipv4: 4649039103 dns-udp-responses-sent-ipv6: 1040540740 dns-tcp-responses-sent-ipv4: 248098896 dns-tcp-responses-sent-ipv6: 87620086