--- version: rssac002v3 service: a.root-servers.net start-period: '2019-07-13T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5521755884 dns-udp-queries-received-ipv6: 1045744176 dns-tcp-queries-received-ipv4: 180760995 dns-tcp-queries-received-ipv6: 31358839 dns-udp-responses-sent-ipv4: 5386346802 dns-udp-responses-sent-ipv6: 1044956411 dns-tcp-responses-sent-ipv4: 175839576 dns-tcp-responses-sent-ipv6: 32223557