--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4750321844 dns-udp-queries-received-ipv6: 1012101869 dns-tcp-queries-received-ipv4: 549651420 dns-tcp-queries-received-ipv6: 143275146 dns-udp-responses-sent-ipv4: 4179327004 dns-udp-responses-sent-ipv6: 880816896 dns-tcp-responses-sent-ipv4: 542982338 dns-tcp-responses-sent-ipv6: 131204073