--- service: i.root-servers.net start-period: '2015-02-12T00:00:00Z' end-period: '2015-02-13T00:00:05Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3586168716 dns-udp-queries-received-ipv6: 261090901 dns-tcp-queries-received-ipv4: 7144335 dns-tcp-queries-received-ipv6: 213706 dns-udp-responses-sent-ipv4: 3533518884 dns-udp-responses-sent-ipv6: 261049993 dns-tcp-responses-sent-ipv4: 7187237 dns-tcp-responses-sent-ipv6: 222228