--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6254551079 dns-udp-queries-received-ipv6: 1208898281 dns-tcp-queries-received-ipv4: 160452336 dns-tcp-queries-received-ipv6: 42386370 dns-udp-responses-sent-ipv4: 6108617041 dns-udp-responses-sent-ipv6: 1207901340 dns-tcp-responses-sent-ipv4: 155652728 dns-tcp-responses-sent-ipv6: 42678233