--- service: i.root-servers.net start-period: '2015-05-07T00:00:00Z' end-period: '2015-05-08T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3773691083 dns-udp-queries-received-ipv6: 254613331 dns-tcp-queries-received-ipv4: 10578286 dns-tcp-queries-received-ipv6: 270755 dns-udp-responses-sent-ipv4: 3715245205 dns-udp-responses-sent-ipv6: 257743375 dns-tcp-responses-sent-ipv4: 10656380 dns-tcp-responses-sent-ipv6: 275789