--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-30T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5273947923 dns-udp-queries-received-ipv6: 935413065 dns-tcp-queries-received-ipv4: 497625978 dns-tcp-queries-received-ipv6: 136098087 dns-udp-responses-sent-ipv4: 4602265459 dns-udp-responses-sent-ipv6: 848869999 dns-tcp-responses-sent-ipv4: 407246201 dns-tcp-responses-sent-ipv6: 117691457