--- service: i.root-servers.net start-period: '2015-05-04T00:00:00Z' end-period: '2015-05-05T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3603372834 dns-udp-queries-received-ipv6: 252438326 dns-tcp-queries-received-ipv4: 10229169 dns-tcp-queries-received-ipv6: 270877 dns-udp-responses-sent-ipv4: 3545071704 dns-udp-responses-sent-ipv6: 255249037 dns-tcp-responses-sent-ipv4: 10287838 dns-tcp-responses-sent-ipv6: 277665