--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-22T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6328608697 dns-udp-queries-received-ipv6: 1215758455 dns-tcp-queries-received-ipv4: 173007174 dns-tcp-queries-received-ipv6: 37844677 dns-udp-responses-sent-ipv4: 6177022774 dns-udp-responses-sent-ipv6: 1214820927 dns-tcp-responses-sent-ipv4: 168514679 dns-tcp-responses-sent-ipv6: 38844434