--- version: rssac002v4 service: a.root-servers.net start-period: '2021-12-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4655346175 dns-udp-queries-received-ipv6: 1170373973 dns-tcp-queries-received-ipv4: 267238345 dns-tcp-queries-received-ipv6: 75443229 dns-udp-responses-sent-ipv4: 4885184288 dns-udp-responses-sent-ipv6: 1204422812 dns-tcp-responses-sent-ipv4: 263172050 dns-tcp-responses-sent-ipv6: 75523901