--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4642946644 dns-udp-queries-received-ipv6: 705874832 dns-tcp-queries-received-ipv4: 255327718 dns-tcp-queries-received-ipv6: 34282504 dns-udp-responses-sent-ipv4: 4539050039 dns-udp-responses-sent-ipv6: 704968035 dns-tcp-responses-sent-ipv4: 252184382 dns-tcp-responses-sent-ipv6: 35171804