--- service: i.root-servers.net start-period: '2015-03-13T00:00:00Z' end-period: '2015-03-14T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3767648763 dns-udp-queries-received-ipv6: 258687650 dns-tcp-queries-received-ipv4: 8849393 dns-tcp-queries-received-ipv6: 262899 dns-udp-responses-sent-ipv4: 3735241160 dns-udp-responses-sent-ipv6: 262206651 dns-tcp-responses-sent-ipv4: 8868981 dns-tcp-responses-sent-ipv6: 265964