--- service: j.root-servers.net start-period: '2015-12-15T00:00:00Z' end-period: '2015-12-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4676005177 dns-udp-queries-received-ipv6: 569098386 dns-tcp-queries-received-ipv4: 131631413 dns-tcp-queries-received-ipv6: 2661093 dns-udp-responses-sent-ipv4: 4370661107 dns-udp-responses-sent-ipv6: 572181969 dns-tcp-responses-sent-ipv4: 115783630 dns-tcp-responses-sent-ipv6: 311429