--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6027340401 dns-udp-queries-received-ipv6: 1135202052 dns-tcp-queries-received-ipv4: 138249615 dns-tcp-queries-received-ipv6: 37395868 dns-udp-responses-sent-ipv4: 5911071825 dns-udp-responses-sent-ipv6: 1124274105 dns-tcp-responses-sent-ipv4: 132456704 dns-tcp-responses-sent-ipv6: 34311368