--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-03T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4907861897 dns-udp-queries-received-ipv6: 776690371 dns-tcp-queries-received-ipv4: 143547862 dns-tcp-queries-received-ipv6: 31858351 dns-udp-responses-sent-ipv4: 4805886845 dns-udp-responses-sent-ipv6: 776196306 dns-tcp-responses-sent-ipv4: 140377675 dns-tcp-responses-sent-ipv6: 32491727