--- version: rssac002v3 service: a.root-servers.net start-period: '2021-09-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5576666970 dns-udp-queries-received-ipv6: 1362919668 dns-tcp-queries-received-ipv4: 305979385 dns-tcp-queries-received-ipv6: 101142410 dns-udp-responses-sent-ipv4: 5579948855 dns-udp-responses-sent-ipv6: 1401158530 dns-tcp-responses-sent-ipv4: 294839782 dns-tcp-responses-sent-ipv6: 101003536