--- version: rssac002v3 service: a.root-servers.net start-period: '2019-06-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5270512488 dns-udp-queries-received-ipv6: 1043671962 dns-tcp-queries-received-ipv4: 154675002 dns-tcp-queries-received-ipv6: 29788836 dns-udp-responses-sent-ipv4: 5153093190 dns-udp-responses-sent-ipv6: 1043112731 dns-tcp-responses-sent-ipv4: 151494546 dns-tcp-responses-sent-ipv6: 30483570