--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-06T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5585778359 dns-udp-queries-received-ipv6: 1084315724 dns-tcp-queries-received-ipv4: 134176836 dns-tcp-queries-received-ipv6: 37420590 dns-udp-responses-sent-ipv4: 5453882747 dns-udp-responses-sent-ipv6: 1069603239 dns-tcp-responses-sent-ipv4: 127749375 dns-tcp-responses-sent-ipv6: 33983928