--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6322251273 dns-udp-queries-received-ipv6: 1223419441 dns-tcp-queries-received-ipv4: 153216433 dns-tcp-queries-received-ipv6: 40613886 dns-udp-responses-sent-ipv4: 6228326900 dns-udp-responses-sent-ipv6: 1210152390 dns-tcp-responses-sent-ipv4: 146838355 dns-tcp-responses-sent-ipv6: 37958353