--- service: j.root-servers.net start-period: '2015-03-20T00:00:00Z' end-period: '2015-03-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3218863712 dns-udp-queries-received-ipv6: 337844975 dns-tcp-queries-received-ipv4: 27716545 dns-tcp-queries-received-ipv6: 5522737 dns-udp-responses-sent-ipv4: 3239020167 dns-udp-responses-sent-ipv6: 337677792 dns-tcp-responses-sent-ipv4: 27427594 dns-tcp-responses-sent-ipv6: 3917967