--- service: i.root-servers.net start-period: '2015-01-04T00:00:00Z' end-period: '2015-01-05T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2795696149 dns-udp-queries-received-ipv6: 220924891 dns-tcp-queries-received-ipv4: 7226935 dns-tcp-queries-received-ipv6: 220131 dns-udp-responses-sent-ipv4: 2773415000 dns-udp-responses-sent-ipv6: 220861425 dns-tcp-responses-sent-ipv4: 7388141 dns-tcp-responses-sent-ipv6: 223631