--- service: j.root-servers.net start-period: '2015-09-18T00:00:00Z' end-period: '2015-09-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4796336668 dns-udp-queries-received-ipv6: 490321367 dns-tcp-queries-received-ipv4: 69966015 dns-tcp-queries-received-ipv6: 21730402 dns-udp-responses-sent-ipv4: 3722804850 dns-udp-responses-sent-ipv6: 489259014 dns-tcp-responses-sent-ipv4: 67990147 dns-tcp-responses-sent-ipv6: 19851987