--- version: rssac002v3 service: a.root-servers.net start-period: '2021-05-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4701179517 dns-udp-queries-received-ipv6: 1010272702 dns-tcp-queries-received-ipv4: 275542762 dns-tcp-queries-received-ipv6: 102915222 dns-udp-responses-sent-ipv4: 4663255096 dns-udp-responses-sent-ipv6: 1028142252 dns-tcp-responses-sent-ipv4: 267225360 dns-tcp-responses-sent-ipv6: 102616347