--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4537526255 dns-udp-queries-received-ipv6: 638938068 dns-tcp-queries-received-ipv4: 109180979 dns-tcp-queries-received-ipv6: 32399381 dns-udp-responses-sent-ipv4: 4429086346 dns-udp-responses-sent-ipv6: 638404632 dns-tcp-responses-sent-ipv4: 106110194 dns-tcp-responses-sent-ipv6: 32901749