--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-11T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6009147884 dns-udp-queries-received-ipv6: 760125706 dns-tcp-queries-received-ipv4: 184726549 dns-tcp-queries-received-ipv6: 34346766 dns-udp-responses-sent-ipv4: 5886365052 dns-udp-responses-sent-ipv6: 759626776 dns-tcp-responses-sent-ipv4: 180764184 dns-tcp-responses-sent-ipv6: 32399710