--- version: rssac002v4 service: a.root-servers.net start-period: '2022-01-27T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5335660388 dns-udp-queries-received-ipv6: 1241080521 dns-tcp-queries-received-ipv4: 320039961 dns-tcp-queries-received-ipv6: 68841193 dns-udp-responses-sent-ipv4: 5353357212 dns-udp-responses-sent-ipv6: 1265761681 dns-tcp-responses-sent-ipv4: 294202161 dns-tcp-responses-sent-ipv6: 68801379