--- version: rssac002v4 service: a.root-servers.net start-period: '2022-04-13T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4848808078 dns-udp-queries-received-ipv6: 1383534869 dns-tcp-queries-received-ipv4: 291376508 dns-tcp-queries-received-ipv6: 48251151 dns-udp-responses-sent-ipv4: 4829373578 dns-udp-responses-sent-ipv6: 1389970018 dns-tcp-responses-sent-ipv4: 288838874 dns-tcp-responses-sent-ipv6: 48231317