--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6195715414 dns-udp-queries-received-ipv6: 1158348940 dns-tcp-queries-received-ipv4: 161985647 dns-tcp-queries-received-ipv6: 37524463 dns-udp-responses-sent-ipv4: 6046586180 dns-udp-responses-sent-ipv6: 1157126961 dns-tcp-responses-sent-ipv4: 157995647 dns-tcp-responses-sent-ipv6: 39053637