--- service: i.root-servers.net start-period: '2014-06-18T00:00:00Z' end-period: '2014-06-19T00:00:11Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2947385540 dns-udp-queries-received-ipv6: 254081828 dns-tcp-queries-received-ipv4: 8370535 dns-tcp-queries-received-ipv6: 296310 dns-udp-responses-sent-ipv4: 2894847732 dns-udp-responses-sent-ipv6: 256433999 dns-tcp-responses-sent-ipv4: 8584081 dns-tcp-responses-sent-ipv6: 297245