--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6149147428 dns-udp-queries-received-ipv6: 1228027031 dns-tcp-queries-received-ipv4: 543933522 dns-tcp-queries-received-ipv6: 158103188 dns-udp-responses-sent-ipv4: 5205959095 dns-udp-responses-sent-ipv6: 1127586202 dns-tcp-responses-sent-ipv4: 494245264 dns-tcp-responses-sent-ipv6: 145688184