--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4601909139 dns-udp-queries-received-ipv6: 913759879 dns-tcp-queries-received-ipv4: 518077000 dns-tcp-queries-received-ipv6: 147202478 dns-udp-responses-sent-ipv4: 3735311933 dns-udp-responses-sent-ipv6: 842115004 dns-tcp-responses-sent-ipv4: 435212894 dns-tcp-responses-sent-ipv6: 136334330