--- service: j.root-servers.net start-period: '2015-12-21T00:00:00Z' end-period: '2015-12-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3148775783 dns-udp-queries-received-ipv6: 423766561 dns-tcp-queries-received-ipv4: 86568612 dns-tcp-queries-received-ipv6: 1537147 dns-udp-responses-sent-ipv4: 3081493878 dns-udp-responses-sent-ipv6: 420869422 dns-tcp-responses-sent-ipv4: 65607409 dns-tcp-responses-sent-ipv6: 205657