--- version: rssac002v3 service: j.root-servers.net start-period: '2021-04-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6981926702 dns-udp-queries-received-ipv6: 1636595467 dns-tcp-queries-received-ipv4: 540837415 dns-tcp-queries-received-ipv6: 127171137 dns-udp-responses-sent-ipv4: 6521547770 dns-udp-responses-sent-ipv6: 1612465432 dns-tcp-responses-sent-ipv4: 384155381 dns-tcp-responses-sent-ipv6: 118612998