--- version: rssac002v3 service: i.root-servers.net start-period: '2018-12-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5778940761 dns-udp-queries-received-ipv6: 1124983465 dns-tcp-queries-received-ipv4: 128277643 dns-tcp-queries-received-ipv6: 30172012 dns-udp-responses-sent-ipv4: 5718994303 dns-udp-responses-sent-ipv6: 1132456882 dns-tcp-responses-sent-ipv4: 124598380 dns-tcp-responses-sent-ipv6: 29627373