--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5250577102 dns-udp-queries-received-ipv6: 749547861 dns-tcp-queries-received-ipv4: 173331945 dns-tcp-queries-received-ipv6: 35440965 dns-udp-responses-sent-ipv4: 5133436005 dns-udp-responses-sent-ipv6: 749049930 dns-tcp-responses-sent-ipv4: 171038569 dns-tcp-responses-sent-ipv6: 36257290