--- service: i.root-servers.net start-period: '2015-10-11T00:00:00Z' end-period: '2015-10-12T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3957270376 dns-udp-queries-received-ipv6: 322013851 dns-tcp-queries-received-ipv4: 23990037 dns-tcp-queries-received-ipv6: 456367 dns-udp-responses-sent-ipv4: 3895263046 dns-udp-responses-sent-ipv6: 321999471 dns-tcp-responses-sent-ipv4: 24042671 dns-tcp-responses-sent-ipv6: 461967