--- service: j.root-servers.net start-period: '2013-12-13T00:00:00Z' end-period: '2013-12-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2526594030 dns-udp-queries-received-ipv6: 135240442 dns-tcp-queries-received-ipv4: 23613760 dns-tcp-queries-received-ipv6: 4289024 dns-udp-responses-sent-ipv4: 2520456793 dns-udp-responses-sent-ipv6: 135149146 dns-tcp-responses-sent-ipv4: 21921905 dns-tcp-responses-sent-ipv6: 171