--- service: i.root-servers.net start-period: '2015-08-12T00:00:00Z' end-period: '2015-08-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5434991073 dns-udp-queries-received-ipv6: 273073372 dns-tcp-queries-received-ipv4: 17943922 dns-tcp-queries-received-ipv6: 375955 dns-udp-responses-sent-ipv4: 5388478242 dns-udp-responses-sent-ipv6: 275330387 dns-tcp-responses-sent-ipv4: 17975412 dns-tcp-responses-sent-ipv6: 378638