--- version: rssac002v3 service: a.root-servers.net start-period: '2021-07-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7769501494 dns-udp-queries-received-ipv6: 1317717497 dns-tcp-queries-received-ipv4: 271159288 dns-tcp-queries-received-ipv6: 97369126 dns-udp-responses-sent-ipv4: 7627233378 dns-udp-responses-sent-ipv6: 1316180723 dns-tcp-responses-sent-ipv4: 265181325 dns-tcp-responses-sent-ipv6: 97600415