--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-14T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5149683924 dns-udp-queries-received-ipv6: 1115756848 dns-tcp-queries-received-ipv4: 589784214 dns-tcp-queries-received-ipv6: 146813056 dns-udp-responses-sent-ipv4: 4543233274 dns-udp-responses-sent-ipv6: 968948100 dns-tcp-responses-sent-ipv4: 565723422 dns-tcp-responses-sent-ipv6: 131698284