--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5194001890 dns-udp-queries-received-ipv6: 992992148 dns-tcp-queries-received-ipv4: 497486664 dns-tcp-queries-received-ipv6: 128571532 dns-udp-responses-sent-ipv4: 4073941786 dns-udp-responses-sent-ipv6: 894808324 dns-tcp-responses-sent-ipv4: 362010177 dns-tcp-responses-sent-ipv6: 116267448