--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-15T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5186159053 dns-udp-queries-received-ipv6: 999601809 dns-tcp-queries-received-ipv4: 508421039 dns-tcp-queries-received-ipv6: 135578897 dns-udp-responses-sent-ipv4: 4072859698 dns-udp-responses-sent-ipv6: 884444350 dns-tcp-responses-sent-ipv4: 379681441 dns-tcp-responses-sent-ipv6: 122230181