--- version: rssac002v3 service: i.root-servers.net start-period: '2019-04-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6860853399 dns-udp-queries-received-ipv6: 1179883288 dns-tcp-queries-received-ipv4: 146361369 dns-tcp-queries-received-ipv6: 33825008 dns-udp-responses-sent-ipv4: 6748653695 dns-udp-responses-sent-ipv6: 1227709612 dns-tcp-responses-sent-ipv4: 141933559 dns-tcp-responses-sent-ipv6: 32352084