--- service: j.root-servers.net start-period: '2015-02-28T00:00:00Z' end-period: '2015-02-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2923633987 dns-udp-queries-received-ipv6: 305194890 dns-tcp-queries-received-ipv4: 28028867 dns-tcp-queries-received-ipv6: 3614053 dns-udp-responses-sent-ipv4: 2929096011 dns-udp-responses-sent-ipv6: 305240153 dns-tcp-responses-sent-ipv4: 27891160 dns-tcp-responses-sent-ipv6: 3336372