--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6084769191 dns-udp-queries-received-ipv6: 1245689898 dns-tcp-queries-received-ipv4: 565412214 dns-tcp-queries-received-ipv6: 150400817 dns-udp-responses-sent-ipv4: 5161692677 dns-udp-responses-sent-ipv6: 1116387059 dns-tcp-responses-sent-ipv4: 530680168 dns-tcp-responses-sent-ipv6: 135659109