--- service: i.root-servers.net start-period: '2014-07-23T00:00:00Z' end-period: '2014-07-24T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3661586956 dns-udp-queries-received-ipv6: 279313856 dns-tcp-queries-received-ipv4: 11174185 dns-tcp-queries-received-ipv6: 338846 dns-udp-responses-sent-ipv4: 3591727921 dns-udp-responses-sent-ipv6: 279156197 dns-tcp-responses-sent-ipv4: 11136491 dns-tcp-responses-sent-ipv6: 338619