--- service: j.root-servers.net start-period: '2015-12-28T00:00:00Z' end-period: '2015-12-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3629148086 dns-udp-queries-received-ipv6: 563760702 dns-tcp-queries-received-ipv4: 68471106 dns-tcp-queries-received-ipv6: 1951035 dns-udp-responses-sent-ipv4: 3527233783 dns-udp-responses-sent-ipv6: 566821509 dns-tcp-responses-sent-ipv4: 59009337 dns-tcp-responses-sent-ipv6: 272016