--- service: j.root-servers.net start-period: '2015-02-19T00:00:00Z' end-period: '2015-02-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4107570063 dns-udp-queries-received-ipv6: 325188720 dns-tcp-queries-received-ipv4: 24847380 dns-tcp-queries-received-ipv6: 3738883 dns-udp-responses-sent-ipv4: 4108927855 dns-udp-responses-sent-ipv6: 325339675 dns-tcp-responses-sent-ipv4: 24642925 dns-tcp-responses-sent-ipv6: 3034559