--- version: rssac002v3 service: a.root-servers.net start-period: '2019-03-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5193610458 dns-udp-queries-received-ipv6: 741625172 dns-tcp-queries-received-ipv4: 207714378 dns-tcp-queries-received-ipv6: 29002770 dns-udp-responses-sent-ipv4: 5076503183 dns-udp-responses-sent-ipv6: 741153177 dns-tcp-responses-sent-ipv4: 203669942 dns-tcp-responses-sent-ipv6: 29340015