--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-05T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4918016473 dns-udp-queries-received-ipv6: 934980742 dns-tcp-queries-received-ipv4: 444034352 dns-tcp-queries-received-ipv6: 124476521 dns-udp-responses-sent-ipv4: 4133277533 dns-udp-responses-sent-ipv6: 876845189 dns-tcp-responses-sent-ipv4: 367012241 dns-tcp-responses-sent-ipv6: 123164007