--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6548461581 dns-udp-queries-received-ipv6: 1212490441 dns-tcp-queries-received-ipv4: 145245531 dns-tcp-queries-received-ipv6: 34441566 dns-udp-responses-sent-ipv4: 6464254073 dns-udp-responses-sent-ipv6: 1202519491 dns-tcp-responses-sent-ipv4: 139256455 dns-tcp-responses-sent-ipv6: 32348198