--- service: j.root-servers.net start-period: '2017-01-21T00:00:00Z' end-period: '2017-01-21T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5995045677 dns-udp-queries-received-ipv6: 609349740 dns-tcp-queries-received-ipv4: 171626263 dns-tcp-queries-received-ipv6: 12456777 dns-udp-responses-sent-ipv4: 5772264810 dns-udp-responses-sent-ipv6: 613199539 dns-tcp-responses-sent-ipv4: 158844213 dns-tcp-responses-sent-ipv6: 12594684