--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-08T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5397839912 dns-udp-queries-received-ipv6: 1018181121 dns-tcp-queries-received-ipv4: 156759696 dns-tcp-queries-received-ipv6: 28951139 dns-udp-responses-sent-ipv4: 5278435642 dns-udp-responses-sent-ipv6: 1017479816 dns-tcp-responses-sent-ipv4: 153047400 dns-tcp-responses-sent-ipv6: 29591322