--- version: rssac002v3 service: a.root-servers.net start-period: '2019-04-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5759832154 dns-udp-queries-received-ipv6: 869376213 dns-tcp-queries-received-ipv4: 192453472 dns-tcp-queries-received-ipv6: 27876448 dns-udp-responses-sent-ipv4: 5632570356 dns-udp-responses-sent-ipv6: 868923430 dns-tcp-responses-sent-ipv4: 189560843 dns-tcp-responses-sent-ipv6: 28412537