--- version: rssac002v4 service: j.root-servers.net start-period: '2021-12-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5861462473 dns-udp-queries-received-ipv6: 1243968609 dns-tcp-queries-received-ipv4: 346312009 dns-tcp-queries-received-ipv6: 83817253 dns-udp-responses-sent-ipv4: 5519118406 dns-udp-responses-sent-ipv6: 1218353158 dns-tcp-responses-sent-ipv4: 248262483 dns-tcp-responses-sent-ipv6: 79786038