--- service: j.root-servers.net start-period: '2015-09-19T00:00:00Z' end-period: '2015-09-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4525996900 dns-udp-queries-received-ipv6: 478329682 dns-tcp-queries-received-ipv4: 67422668 dns-tcp-queries-received-ipv6: 21646306 dns-udp-responses-sent-ipv4: 3448616969 dns-udp-responses-sent-ipv6: 476916882 dns-tcp-responses-sent-ipv4: 65860253 dns-tcp-responses-sent-ipv6: 19844537